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Last updated: September 10, 2026
On this page: The Elemental System · Pentagrams · Errtels · Ranks & Mounting · Where to Get Them · FAQ · Mastery Pentagrams
MU Online Pentagrams & Errtels – The Complete Elemental System Guide
The pentagram system is MU Online’s parallel combat layer: a dedicated slot whose elemental attack and defense are calculated outside the normal damage formula. Armour, DD% and reflect do nothing against it — only elemental defense does. A pentagram carries an element (Fire, Water, Earth, Wind or Darkness), up to five sockets for errtels, and its own enhanced options; the whole Arca War guild event is fought with it. Every number below is read from a Season 21 server’s pentagram files and item list, with each pentagram and errtel rendered from the client model.
On this page: Element Wheel · Damage Multipliers · All Pentagrams · Enhanced Options · Errtels · Ranks, Levels & Sockets · Elemental Options on Wings · Where to Get Them · FAQ
How Elements Work
| Rule | Details |
|---|---|
| Five elements | Fire, Water, Earth, Wind, Darkness. Pentagrams, errtels and elemental capsules all carry one; a character’s element is whatever pentagram is equipped. |
| Strength circle | Fire → Darkness → Wind → Earth → Water → Fire — each element deals bonus elemental damage to the next one in the chain and reduced damage to the one before it. Fire beats Darkness but loses to Water; Water beats Fire but loses to Earth, and so on. |
| Separate formula | Elemental damage is rolled against the target’s elemental defense only. Regular defense, damage decrease, reflect and shield-of-armour options do not touch it; on the default configuration it is applied to SD first, then HP. |
| What feeds the pools | Pentagram base stats, every mounted errtel, enhanced pentagram options, 4th/5th wing elemental options, earrings and Wing Cores. |
| Punish, Bleeding, Paralyze | Errtel of Radiance procs; the server controls whether Punish works in PvP and PvM separately (both enabled on this configuration). |
Elemental Damage Multipliers
The exact final-damage multiplier by attacker element (rows) against target element (columns), as configured in the server’s character formula file. PvM values are what you feel while hunting; the PvP table is deliberately inflated so that elemental damage stays relevant against players’ huge defense. “None” is a target without a pentagram.
PvM (monsters)
| Attacker ↓ / Target → | Fire | Water | Earth | Wind | Darkness | None |
|---|---|---|---|---|---|---|
| Fire | 100% | 90% | 95% | 105% | 110% | 100% |
| Water | 110% | 100% | 90% | 95% | 105% | 100% |
| Earth | 105% | 110% | 100% | 90% | 95% | 100% |
| Wind | 95% | 105% | 110% | 100% | 90% | 100% |
| Darkness | 90% | 95% | 105% | 110% | 100% | 100% |
PvP (players)
| Attacker ↓ / Target → | Fire | Water | Earth | Wind | Darkness | None |
|---|---|---|---|---|---|---|
| Fire | 130% | 116% | 123% | 136% | 143% | 143% |
| Water | 143% | 130% | 116% | 123% | 136% | 143% |
| Earth | 136% | 143% | 130% | 116% | 123% | 143% |
| Wind | 123% | 136% | 143% | 130% | 116% | 143% |
| Darkness | 116% | 123% | 136% | 143% | 130% | 143% |
Green = the element you counter, red = the element that counters you. Same-element hits sit in the middle. Practical rule: build the element that counters what you fight most, and keep a second pentagram of another element in the inventory for Arca War match-ups.
All Pentagrams
Every pentagram item on the server, grouped by grade. Level is the drop level; ATK/DEF are the base physical values the item adds, elemental ATK/DEF are its contribution to the elemental pools before errtels. Grade decides how many errtel sockets it can hold and which enhanced options it can roll. Pentagrams share seven models — a rare Kundun’s Madness Blade looks like the common Gladiator’s Dagger — so the card art shows the model, and the element is shown by the item’s glow colour in game.
Common pentagrams
Common · Lv 1 · starter item
- Pentagram DMG and DEF+5%
Common · Lv 100
Common · Lv 150
Common · Lv 150
Common · Lv 150
Common · Lv 150
Common · Lv 180
- Increase Pentagram DEF +10%
Common · Lv 180
- Elemental Critical DMG Rate +10%
Common · Lv 180
- Increase Pentagram DMG +10%
Common · Lv 180
- Increase Errtel of Blessing Rank 1 Option +35
Rare pentagrams
Rare · Lv 300
- DEF Added to Elemental DEF +5%
- Elemental Critical DMG Rate +10%
Rare · Lv 300
- DMG Added to Elemental DMG +1%
- Elemental Critical DMG Rate +10%
Rare · Lv 300
- DEF Added to Elemental DEF +5%
- %s, %s Elemental DMG Perfect Dodge Rate +5%
Rare · Lv 300
- DMG Added to Elemental DMG +1%
- %s, %s Elemental DMG Perfect Dodge Rate +5%
Rare · Lv 300
- DMG Added to Elemental DMG +1%
- Elemental Critical DMG Rate +10%
Rare · Lv 300
- Pentagram DMG and DEF+5%
- Increase Pentagram DMG +10%
- Increase Elemental DMG +30
Rare · Lv 300
- Pentagram DMG and DEF+5%
- Increase Pentagram DEF +10%
- Increase Elemental DEF +30
Rare · Lv 300
- Elemental Critical DMG Rate +5%
- Elemental Critical DMG Rate +10%
- Elemental Critical DMG Rate +25%
Rare · Lv 800
- Increase Pentagram DMG/DEF +5%
- Increase Pentagram DEF +10%
- Elemental Critical DMG Rate +25%
Unique pentagrams
Unique · Lv 300
- Elemental DMG Perfect Dodge Rate +5%
- Elemental Critical DMG Rate +10%
Unique · Lv 300
- Elemental DMG Perfect Dodge Rate +5%
- DEF Added to Elemental DEF +5%
Unique · Lv 300
- Elemental DMG Perfect Dodge Rate +5%
- DMG Added to Elemental DMG +1%
Unique · Lv 800
- Elemental DMG Perfect Dodge Rate +5%
- DEF Added to Elemental DEF +5%
| Grade | Sockets | Enhanced options | Typical source |
|---|---|---|---|
| Common | 2 (rank 1 and rank 2 errtels) | 0–1 fixed line on the “upgraded” commons (Iron Shield of the Magic, Brave Hero Elixir, Merciless Dagger, Thoughtful Sage’s Jewel) | Uruk Mountain, Nars, Elemental Capsules |
| Rare | 3 sockets (70%) or 4 sockets (30%), rolled on drop | 2–3 lines | Boss drops (Kundun, Lord Silvester, Runedil, Lemuria), Arca War, Element Box |
| Unique | 4 sockets (100%) | 2 lines including Perfect Dodge | Arca War rewards, God of Darkness, top boss tables |
Enhanced Pentagram Options
Rare and unique pentagrams come with fixed “enhanced” lines. Each line only activates when the sockets hold the errtels it asks for (type, minimum rank and sometimes minimum level) — that is why the same Antonia’s Sword can feel useless with random errtels and dominant with the right set.
| Option | Requires in sockets | Found on |
|---|---|---|
| Pentagram DMG and DEF+5% | Anger rank 1, Blessing rank 1, Integrity rank 1, Divinity rank 1 | Pentagram for Beginners |
| Increase Pentagram DMG +10% | Anger rank 1 | Merciless Gladiator's Dagger |
| Increase Pentagram DEF +10% | Anger rank 1 | Iron Shield of the Magic |
| Elemental Critical DMG Rate +10% | Anger rank 1 | Brave Hero Elixir |
| Increase Errtel of Blessing Rank 1 Option +35 | Anger rank 1, Blessing rank 1 | Thoughtful Sage's Jewel |
| Increase Pentagram DMG +10% | Anger rank 2, Integrity rank 2 | Runedil's Goldentune Harp |
| Increase Pentagram DEF +10% | Blessing rank 2, Divinity rank 2 | Lemuria's Orb |
| Elemental Critical DMG Rate +5% | Blessing rank 1 +7 | Norrwen's Bloodstring Lyra |
| Elemental Critical DMG Rate +10% | Anger rank 2 +3 | Arca's Prophecy, Kundun's Madness Blade, Kundun's Magic Spell Scroll, Magic Scroll (Elemental), Norrwen's Bloodstring Lyra |
| Elemental Critical DMG Rate +25% | Anger rank 3, Blessing rank 3 | Norrwen's Bloodstring Lyra |
| DEF Added to Elemental DEF +5% | Anger rank 3, Blessing rank 3 | Empire Guardians' Stronghold, Kundun's Madness Blade |
| DMG Added to Elemental DMG +1% | Anger rank 3, Blessing rank 3 | Ancient Icarus Scroll, Kundun's Magic Spell Scroll, Magic Scroll (Elemental) |
| Two-element Elemental DMG Perfect Dodge Rate +5% | Blessing rank 2, Integrity rank 1 +7 | Ancient Icarus Scroll, Empire Guardians' Stronghold |
| Increase Elemental DMG +30 | Anger rank 3, Integrity rank 3 | Runedil's Goldentune Harp |
| Increase Elemental DEF +30 | Blessing rank 3, Divinity rank 3 | Lemuria's Orb |
| Pentagram DMG and DEF+5% | Anger rank 1 +7, Blessing rank 1 +7, Radiance rank 1 +7 | Lemuria's Orb, Runedil's Goldentune Harp |
| Elemental DMG Perfect Dodge Rate +5% | Blessing rank 3 +6, Integrity rank 3 +6, Divinity rank 3 +6 | Antonia's Sword, Arca's Prophecy, Kundun's Seal Scroll |
| DEF Added to Elemental DEF +5% | Anger rank 3 +5, Blessing rank 3 +5 | Antonia's Sword |
| DMG Added to Elemental DMG +1% | Anger rank 3 +5, Blessing rank 3 +5 | Kundun's Seal Scroll |
| Increase Pentagram DMG/DEF +5% | Anger rank 1 +7, Radiance rank 1 +7 | Brilliant Orb (I) |
Read the middle column as a shopping list: Norrwen’s Bloodstring Lyra only shows its +25% critical line once it holds a rank-3 Anger and a rank-3 Blessing errtel, and the Perfect Dodge line on unique pentagrams needs rank-3 Blessing, Integrity and Divinity errtels all at +6 or higher.
Errtels
Errtels are the gems that go into pentagram sockets. There are five types; each has a rank (1–5, which socket it can sit in and which option group it rolls) and a level (+0 to +10, which scales the option value). The Beginner errtels are the starter versions handed out with the Pentagram for Beginners; the (I) errtels are the Season 16+ high-tier line with roughly three times the values.
Offense · Lv 110 · base elemental ATK +12 / DEF +14
Defense · Lv 115 · base elemental ATK +12 / DEF +14
Rates · Lv 120 · base elemental ATK +12 / DEF +14
Chance effects · Lv 125 · base elemental ATK +12 / DEF +14
Debuffs
Every errtel option by rank
Option text exactly as the client shows it, with the value at +0 and at +10. Rank 2 always rolls one of the five element-specific lines (20% each); ranks 3 and 4 roll one of two PvP/PvM variants (50% each). Radiance is the exception — its rank 1 rolls one of six stat lines and ranks 2–5 give the proc and skill effects.
Errtel of Anger
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Damage +30 (100%) | 30 | 168 |
| Rank 2 | Attack Against Fire Element +226 (20%) | 226 | 461 |
| Attack Against Water Element +226 (20%) | 226 | 461 | |
| Attack Against Earth Element +226 (20%) | 226 | 461 | |
| Attack Against Wind Element +226 (20%) | 226 | 461 | |
| Attack Against Dark Element +226 (20%) | 226 | 461 | |
| Rank 3 | Elemental Attack DMG (PvP) +30 (50%) | 30 | 207 |
| Elemental Attack DMG (PvM) +30 (50%) | 30 | 207 | |
| Rank 4 | Elemental Damage (PvP) +20% (50%) | 20 | 158 |
| Elemental Damage (PvM) +20% (50%) | 20 | 158 | |
| Rank 5 | Elemental Damage +15% (100%) | 15 | 153 |
Errtel of Blessing
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Defense +10 (100%) | 10 | 85 |
| Rank 2 | Defense Against Fire Element +90 (20%) | 90 | 325 |
| Defense Against Water Element +90 (20%) | 90 | 325 | |
| Defense Against Earth Element +90 (20%) | 90 | 325 | |
| Defense Against Wind Element +90 (20%) | 90 | 325 | |
| Defense Against Dark Element +90 (20%) | 90 | 325 | |
| Rank 3 | Elemental Defense (PvP) +10 (50%) | 10 | 85 |
| Elemental Defense (PvM) +10 (50%) | 10 | 85 | |
| Rank 4 | Elemental Damage Absorb (PvP) +1% (50%) | 1 | 23 |
| Elemental Damage Absorb (PvM) +1% (50%) | 1 | 23 | |
| Rank 5 | Elemental Damage Absorb +1% (100%) | 1 | 23 |
Errtel of Integrity
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Attack Success Rate +290 (100%) | 290 | 1165 |
| Rank 2 | Attack Against Fire Element +226 (20%) | 226 | 461 |
| Attack Against Water Element +226 (20%) | 226 | 461 | |
| Attack Against Earth Element +226 (20%) | 226 | 461 | |
| Attack Against Wind Element +226 (20%) | 226 | 461 | |
| Attack Against Dark Element +226 (20%) | 226 | 461 | |
| Rank 3 | Elemental Attack DMG (PvP) +30 (50%) | 30 | 207 |
| Elemental Attack DMG (PvM) +30 (50%) | 30 | 207 | |
| Rank 4 | Elemental Attack Success Rate (PvP) +170 (50%) | 170 | 500 |
| Elemental Attack Success Rate (PvM) +170 (50%) | 170 | 500 | |
| Rank 5 | Attack Success Rate +50 (100%) | 50 | 400 |
Errtel of Divinity
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Defense Success Rate +17 (100%) | 17 | 72 |
| Rank 2 | Defense Against Fire Element +90 (20%) | 90 | 325 |
| Defense Against Water Element +90 (20%) | 90 | 325 | |
| Defense Against Earth Element +90 (20%) | 90 | 325 | |
| Defense Against Wind Element +90 (20%) | 90 | 325 | |
| Defense Against Dark Element +90 (20%) | 90 | 325 | |
| Rank 3 | Elemental Defense (PvP) +10 (50%) | 10 | 85 |
| Elemental Defense (PvM) +10 (50%) | 10 | 85 | |
| Rank 4 | Elemental Defense Success Rate (PvP) +170 (50%) | 170 | 500 |
| Elemental Defense Success Rate (MvP) +170 (50%) | 170 | 500 | |
| Rank 5 | Elemental Defense Success Rate +50 (100%) | 50 | 400 |
Errtel of Radiance
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Damage (II) +33 (22%) | 33 | 209 |
| Elemental Defense (II) +13 (22%) | 13 | 107 | |
| Elemental Attack Success Rate (II) +150 (24%) | 150 | 605 | |
| Elemental Defense Success Rate (II) +150 (24%) | 150 | 605 | |
| Elemental Damage (III) +33 (2%) | 33 | 261 | |
| Elemental Defense (III) +13 (2%) | 13 | 135 | |
| Rank 2 | Absorb Shield - 30% chance to absorb 1% Damage as SD (49%) | 1 | 11 |
| Absorb Life - 30% chance to absorb 1% Damage as Life (48%) | 1 | 11 | |
| Bastion - Protection is activated for 3 sec. by 50% chance when SD is below 20% (1%) | 3 | 25 | |
| Rank 3 | Bleeding - A durable effect invoking 100 damages to the target with certain chance when attacking (33%) | 100 | 500 |
| Paralyzing - Chance to decrease target's Moving Speed and every Healing ability by 90% (18%) | 13 | 35 | |
| Binding - Immobilize the target by holding its leg with certain chance when attacking (27%) | 13 | 35 | |
| Punish - 30% chance to inflict Damage (6% of target's MAX Life) upon Critical Elemental Damage (1%) | 6 | 16 | |
| Blinding - Chance to greatly decrease target's Attack Success Rate by 50% when attacking (20%) | 50 | 85 | |
| Rank 4 | Can use Immune Skill I. (70%) | 13 | 35 |
| Can use Immune Skill II. (30%) | 13 | 35 | |
| Rank 5 | Can use Berserker Skill I. (100%) | 13 | 35 |
Anger Errtel (I)
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Damage +93 (100%) | 93 | 231 |
| Rank 2 | Attack Against Fire Element +368 (20%) | 368 | 603 |
| Attack Against Water Element +368 (20%) | 368 | 603 | |
| Attack Against Earth Element +368 (20%) | 368 | 603 | |
| Attack Against Wind Element +368 (20%) | 368 | 603 | |
| Attack Against Dark Element +368 (20%) | 368 | 603 | |
| Rank 3 | Elemental Attack DMG (PvP) +117 (50%) | 117 | 294 |
| Elemental Attack DMG (PvM) +117 (50%) | 117 | 294 | |
| Rank 4 | Elemental Damage (PvP) +100% (50%) | 100 | 267 |
| Elemental Damage (PvM) +100% (50%) | 100 | 267 | |
| Rank 5 | Elemental Damage +73% (100%) | 73 | 204 |
Blessing Errtel (I)
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Defense +52 (100%) | 52 | 127 |
| Rank 2 | Defense Against Fire Element +232 (20%) | 232 | 467 |
| Defense Against Water Element +232 (20%) | 232 | 467 | |
| Defense Against Earth Element +232 (20%) | 232 | 467 | |
| Defense Against Wind Element +232 (20%) | 232 | 467 | |
| Defense Against Dark Element +232 (20%) | 232 | 467 | |
| Rank 3 | Elemental Defense (PvP) +52 (50%) | 52 | 127 |
| Elemental Defense (PvM) +52 (50%) | 52 | 127 | |
| Rank 4 | Elemental Damage Absorb (PvP) +5% (50%) | 5 | 27 |
| Elemental Damage Absorb (PvM) +5% (50%) | 5 | 27 | |
| Rank 5 | Elemental Damage Absorb +3% (100%) | 3 | 25 |
Integrity Errtel (I)
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Attack Success Rate +814 (100%) | 814 | 1689 |
| Rank 2 | Attack Against Fire Element +368 (20%) | 368 | 603 |
| Attack Against Water Element +368 (20%) | 368 | 603 | |
| Attack Against Earth Element +368 (20%) | 368 | 603 | |
| Attack Against Wind Element +368 (20%) | 368 | 603 | |
| Attack Against Dark Element +368 (20%) | 368 | 603 | |
| Rank 3 | Elemental Attack DMG (PvP) +117 (50%) | 117 | 294 |
| Elemental Attack DMG (PvM) +117 (50%) | 117 | 294 | |
| Rank 4 | Elemental Attack Success Rate (PvP) +270 (50%) | 270 | 800 |
| Elemental Attack Success Rate (PvM) +270 (50%) | 270 | 800 | |
| Rank 5 | Attack Success Rate +150 (100%) | 150 | 500 |
Divinity Errtel (I)
| Rank | Option (chance) | +0 | +10 |
|---|---|---|---|
| Rank 1 | Elemental Defense Success Rate +51 (100%) | 51 | 106 |
| Rank 2 | Defense Against Fire Element +232 (20%) | 232 | 467 |
| Defense Against Water Element +232 (20%) | 232 | 467 | |
| Defense Against Earth Element +232 (20%) | 232 | 467 | |
| Defense Against Wind Element +232 (20%) | 232 | 467 | |
| Defense Against Dark Element +232 (20%) | 232 | 467 | |
| Rank 3 | Elemental Defense (PvP) +52 (50%) | 52 | 127 |
| Elemental Defense (PvM) +52 (50%) | 52 | 127 | |
| Rank 4 | Elemental Defense Success Rate (PvP) +270 (50%) | 270 | 800 |
| Elemental Defense Success Rate (MvP) +270 (50%) | 270 | 800 | |
| Rank 5 | Elemental Defense Success Rate +150 (100%) | 150 | 500 |
Ranks, Levels & Sockets
All elemental crafting is done at Adniel in Elbeland. Two separate ladders exist: level (+0 → +10, costs Elemental Runes) raises the value of the errtel’s existing options; rank (1 → 5, costs Spirit Powder) moves it to the next socket and re-rolls a new, stronger option group. A rank-N errtel can only be mounted in socket N, so a 4-socket pentagram needs one errtel of each rank 1–4.
Level upgrade (Elemental Rune)
| To level | +1 | +2 | +3 | +4 | +5 | +6 | +7 | +8 | +9 | +10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Elemental Runes | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 5 | 6 | 7 |
| Zen | 100,000 | 150,000 | 200,000 | 250,000 | 300,000 | 350,000 | 400,000 | 450,000 | 500,000 | 600,000 |
Total to take one errtel from +0 to +10: 34 Elemental Runes and 3,300,000 Zen. Elemental Runes drop in the elemental maps and come out of Elemental Capsules.
Rank upgrade (Spirit Powder)
| To rank | 2 | 3 | 4 | 5 |
|---|---|---|---|---|
| Spirit Powder | 1 | 3 | 6 | 9 |
| Zen | 100,000 | 100,000 | 150,000 | 200,000 |
| Goes into socket | 2 | 3 | 4 | 5 |
Rank-up also consumes the errtel’s level progress on most versions, so the efficient order is rank first, level last. Removing an errtel from a socket is 100% safe on this configuration (the removal-rate table is set to 100% for every rank and level), so moving a finished set to a better pentagram costs only the fee.
Elemental Options on Wings
4th and 5th level wings can carry an elemental attribute — a main line of Elemental Defense Increase that scales with the wing’s +level, plus a 7.5% chance of one additional elemental line when the attribute is applied. These stack with the pentagram pools and are the main reason an Arca War character upgrades wings past +11.
| Wing level | +0 | +1 | +2 | +3 | +4 | +5 | +6 | +7 | +8 | +9 | +10 | +11 | +12 | +13 | +14 | +15 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Elemental Defense Increase | 25 | 35 | 45 | 55 | 65 | 75 | 85 | 96 | 107 | 118 | 130 | 142 | 154 | 167 | 180 | 193 |
| Elemental Damage Increase (17% of rolls) | 20 | 23 | 27 | 32 | 38 | 45 | 53 | 62 | 72 | 83 | 95 | 108 | 122 | 137 | 153 | 170 |
| Elemental Attack Success Rate Increase (17% of rolls) | 5 | 10 | 15 | 20 | 26 | 32 | 38 | 45 | 52 | 59 | 67 | 75 | 84 | 93 | 104 | 125 |
| Elemental Defense Success Rate Increase (17% of rolls) | 5 | 10 | 15 | 20 | 26 | 32 | 38 | 45 | 52 | 59 | 67 | 75 | 84 | 93 | 104 | 125 |
| Elemental Damage (II) Increase (11% of rolls) | 30 | 34 | 39 | 45 | 52 | 60 | 69 | 79 | 90 | 102 | 115 | 129 | 144 | 160 | 177 | 195 |
| Elemental Defense (II) Increase (17% of rolls) | 4 | 6 | 8 | 10 | 13 | 16 | 19 | 23 | 27 | 31 | 36 | 41 | 46 | 52 | 58 | 64 |
| Elemental Attack Success Rate (II) Increase (11% of rolls) | 10 | 15 | 25 | 35 | 46 | 57 | 68 | 80 | 92 | 104 | 117 | 130 | 144 | 158 | 174 | 200 |
| Elemental Defense Success Rate (II) Increase (11% of rolls) | 10 | 15 | 25 | 35 | 46 | 57 | 68 | 80 | 92 | 104 | 117 | 130 | 144 | 158 | 174 | 200 |
Mastery Pentagrams & Errtels – the “(I)” Items
Season 21 added a mastery tier on top of the normal pentagram system. In the client these items carry a Roman numeral in brackets — Brilliant Orb (I), Antonias’ Sword (I), Anger Errtel (I) — and the server files call them “1st” items. They are not a new element system: they slot into exactly the same pentagram socket and use the same five elements. What changes is that every number is bigger, the pentagrams come with built-in conditional options, and the errtels carry a set bonus that normal errtels do not have.
| Mastery item | Elem. DMG | Elem. DEF | Replaces | Normal DMG / DEF | |
|---|---|---|---|---|---|
| Brilliant Orb (I) | 266 | 216 | Lemuria's Orb | 230 / 180 |
| Antonias' Sword (I) | 296 | 256 | Antonia's Sword | 260 / 220 |
| Anger Errtel (I) | 28 | 30 | Errtel of Anger | 12 / 14 |
| Blessing Errtel (I) | 28 | 30 | Errtel of Blessing | 12 / 14 |
| Integrity Errtel (I) | 28 | 30 | Errtel of Integrity | 12 / 14 |
| Divinity (I) | 28 | 30 | Errtel of Divinity | 12 / 14 |
The pentagram jump is modest on paper — Brilliant Orb (I) is 266/216 against Lemuria’s Orb at 230/180 — but the mastery errtels more than double their base line (28/30 against 12/14), and the option rolls below are where the real gap opens.
Built-in Options on Mastery Pentagrams
A normal pentagram is a blank frame: everything it does comes from the errtels you socket. A mastery pentagram already has options printed on it — but each one is conditional. It stays greyed out until the errtels you have socketed meet the requirement next to it, which is what makes these items an end-game goal rather than a straight upgrade.
Brilliant Orb (I)
| Option | Unlocks when you have socketed |
|---|---|
| Increase Pentagram DMG/DEF +5% | Errtel of Anger at Rank 1, Level 7 + Errtel of Radiance at Rank 1, Level 7 |
| Increase Pentagram DEF +10% | Errtel of Blessing at Rank 2 + Errtel of Divinity at Rank 2 |
| Elemental Critical DMG Rate +25% | Errtel of Anger at Rank 3 + Errtel of Blessing at Rank 3 |
Antonias' Sword (I)
| Option | Unlocks when you have socketed |
|---|---|
| Elemental DMG Perfect Dodge Rate +5% | Errtel of Blessing at Rank 3, Level 6 + Errtel of Integrity at Rank 3, Level 6 + Errtel of Divinity at Rank 3, Level 6 |
| DEF Added to Elemental DEF +5% | Errtel of Anger at Rank 3, Level 5 + Errtel of Blessing at Rank 3, Level 5 |
Read that carefully before you buy: Antonias’ Sword (I) only pays off on a character already running Rank 3 errtels at Level 5–6. On a fresh pentagram build the cheaper Brilliant Orb (I) gives you something at Rank 1 Level 7, which is reachable in a week of Elemental Runes.
Mastery Errtel vs Normal Errtel – Every Rank
Same rank, same option, same level — the mastery version simply rolls higher. The range shown is Level 0 to Level 10 for the main option of each rank. Rank 2 rolls one of five element-specific lines (Fire / Water / Earth / Wind / Darkness) at the same value, so only the Fire line is listed.
| Errtel | Rank | Main option | Normal (Lv 0→10) | Mastery (Lv 0→10) | Gain at Lv 10 |
|---|---|---|---|---|---|
| Anger | 1 | Elemental Damage | 30 → 168 | 93 → 231 | +63 |
| Anger | 2 | Attack Against Fire Element | 226 → 461 | 368 → 603 | +142 |
| Anger | 3 | Elemental Attack Dmg (PvP) | 30 → 207 | 117 → 294 | +87 |
| Anger | 4 | Elemental Damage (PvP) | 20 → 158% | 100 → 267% | +109% |
| Anger | 5 | Elemental Damage | 15 → 153% | 73 → 204% | +51% |
| Blessing | 1 | Elemental Defense | 10 → 85 | 52 → 127 | +42 |
| Blessing | 2 | Defense Against Fire Element | 90 → 325 | 232 → 467 | +142 |
| Blessing | 3 | Elemental Defense (PvP) | 10 → 85 | 52 → 127 | +42 |
| Blessing | 4 | Elemental Damage Absorb (PvP) | 1 → 23% | 5 → 27% | +4% |
| Blessing | 5 | Elemental Damage Absorb | 1 → 23% | 3 → 25% | +2% |
| Integrity | 1 | Elemental Attack Success Rate | 290 → 1165 | 814 → 1689 | +524 |
| Integrity | 2 | Attack Against Fire Element | 226 → 461 | 368 → 603 | +142 |
| Integrity | 3 | Elemental Attack Dmg (PvP) | 30 → 207 | 117 → 294 | +87 |
| Integrity | 4 | Elemental Attack Success Rate (PvP) | 170 → 500 | 270 → 800 | +300 |
| Integrity | 5 | Attack Success Rate | 50 → 400 | 150 → 500 | +100 |
| Divinity | 1 | Elemental Defense Success Rate | 17 → 72 | 51 → 106 | +34 |
| Divinity | 2 | Defense Against Fire Element | 90 → 325 | 232 → 467 | +142 |
| Divinity | 3 | Elemental Defense (PvP) | 10 → 85 | 52 → 127 | +42 |
| Divinity | 4 | Elemental Defense Success Rate (PvP) | 170 → 500 | 270 → 800 | +300 |
| Divinity | 5 | Elemental Defense Success Rate | 50 → 400 | 150 → 500 | +100 |
The headline numbers are at Rank 4 and 5. A normal Rank 5 Errtel of Anger caps at +153% elemental damage; the mastery version caps at +204%. On Integrity the Rank 5 attack success rate goes from +400 to +500, which is the difference between landing elemental hits on a defended target and not.
Mastery Errtel Set Options – Fighting Spirit & Passionate
This is the part that has no equivalent on normal errtels. Every mastery errtel rolls one of two set names when it is created, at a flat 50 / 50 chance. Socket several errtels of the same set into your pentagram and the set bonus activates — so the goal is four matching ones, not four good ones.
| Set | 2 pieces | 3 pieces | 4 pieces |
|---|---|---|---|
| Fighting Spirit | Elemental Attack Power Increase 40 | — | Maximum Attack Power Increase 60 Elemental Damage Increase 100 |
| Passionate | Elemental Defense Increase 30 | — | Defense Increase 45 Elemental Base Defense Increase 20 |
Fighting Spirit is the offensive set and Passionate the defensive one. Note there is no three-piece step on either — going from two to three matching errtels gives you nothing, so a 2+2 split of both sets is strictly better than 3+1. Full four-piece Fighting Spirit is +60 maximum attack power and +100 elemental damage on top of whatever the individual errtels roll.
Levelling a Mastery Errtel
Mastery errtels level with Elemental Runes at Adniel, the same NPC as normal errtels, but on a separate and much steeper table — 55 runes to reach Level 10 against 34 for a normal errtel, and roughly ten times the Zen.
| Level | Mastery: Elemental Runes | Mastery: Zen | Normal: Runes | Normal: Zen |
|---|---|---|---|---|
| 0 → 1 | 1 | 1,000,000 | 1 | 100,000 |
| 1 → 2 | 2 | 1,500,000 | 1 | 150,000 |
| 2 → 3 | 3 | 2,000,000 | 2 | 200,000 |
| 3 → 4 | 4 | 2,500,000 | 2 | 250,000 |
| 4 → 5 | 5 | 3,000,000 | 3 | 300,000 |
| 5 → 6 | 6 | 3,500,000 | 3 | 350,000 |
| 6 → 7 | 7 | 4,000,000 | 4 | 400,000 |
| 7 → 8 | 8 | 5,000,000 | 5 | 450,000 |
| 8 → 9 | 9 | 6,000,000 | 6 | 500,000 |
| 9 → 10 | 10 | 7,000,000 | 7 | 600,000 |
| Total 0 → 10 | 55 | 35,500,000 | 34 | 3,300,000 |
Rank upgrades are unchanged — a mastery errtel goes up in rank on the same Errtel Rank Up mix, and the rank it reaches still decides which pentagram socket it can sit in (Rank 2 → socket 2, Rank 3 → socket 3, and so on). See Ranks, Levels & Sockets above.
How to Get Mastery Pentagrams and Errtels
There is no Chaos Machine recipe for them — you cannot upgrade a normal Lemuria’s Orb into a Brilliant Orb (I). On the Season 21 configuration these are the routes:
| Route | Detail |
|---|---|
| Monster drop | Drop level 800 on every mastery pentagram and errtel, which puts them in the top-tier maps only — Kardamahal, Aquilas Temple, the Abyss of Atlas floors and Deep Dungeon. Most servers set the rate very low. |
| Item Shop | Sold pre-made with a fixed element (Fire, Water, Earth, Wind or Darkness), five sockets and +15 / +7 options. This is how most players on official-style servers actually get their first one. |
| Event boxes | Server-dependent. Mastery reward chests and season-pass tiers on many private servers include them; check your server’s own drop list, as this part varies more than anything else in the system. |
| Element choice | A mastery pentagram is bound to one element when created, and the Element Change mix at Adniel is the only way to move it. Pick the element that counters what you fight most — see the multiplier table. |
Worth it? For pure PvM, a normal Rank 4–5 errtel setup on a Grade 2 pentagram already clears content, and mastery gear is a luxury. For Arca War and pentagram PvP, where physical damage is switched off and only elemental damage lands, the mastery tier is close to mandatory at the top — the +51% elemental damage gap at Rank 5 decides fights on its own.
Where to Get Pentagrams & Errtels
| Source | Drops |
|---|---|
| Pentagram for Beginners + Beginner errtels | Free starter kit (Lv 1 quest / Gremory Case) — a working elemental slot from level 1 |
| Uruk Mountain, Nars, Debenter | Common pentagrams, Anger / Blessing / Integrity / Divinity errtels, Elemental Runes, Spirit Powder |
| Ferea, Nixie Lake, Deep Dungeon, Swamp of Darkness | Rare pentagrams, higher-level errtels, Fragments of Radiance |
| Bosses: Kundun, Lord Silvester, Runedil, Lemuria’s guardians, God of Darkness | Named rare and unique pentagrams (Kundun’s Madness Blade, Runedil’s Goldentune Harp, Lemuria’s Orb, Arca’s Prophecy, Antonia’s Sword, Kundun’s Seal Scroll) |
| Arca War | The elemental guild war; winners take unique pentagrams, Elemental Talismans and Pentagram Boxes |
| Elemental Capsule (Fire / Water / Earth / Wind / Darkness), Element Box, Pentagram Box | Event and shop boxes that give a random pentagram or errtel of the chosen element |
| Luminous Errtel Capsule (per element) | Event capsules with mid-rank errtels of one element |
| Talisman of Element Change | Re-rolls a pentagram’s element (combination at Adniel, 100% success) |
| Fragments of Radiance (slots 1–4) | Combined at Adniel into an Errtel of Radiance |
Continue Reading
| Guide | Why it helps |
|---|---|
| Wing Cores | The other big elemental stat source — cores and errtels stack. |
| Earrings | Elemental DEF on every earring — part of the same defensive pool. |
| Ability Cards | Option cards with elemental ATK/DEF lines per element type. |
| 5th level wings | The endgame wings whose cores plug into this system. |
FAQ
What is a pentagram in MU Online?
An item for the dedicated pentagram slot that gives your character an element (Fire, Water, Earth, Wind or Darkness), elemental attack and defense, and 2 to 4 sockets for errtels. Elemental damage is calculated separately from normal damage and ignores regular defense.
Which element is strongest?
None - it is a circle. Fire beats Darkness, Darkness beats Wind, Wind beats Earth, Earth beats Water and Water beats Fire. Pick the element that counters what you fight most, or keep two pentagrams.
How many errtel sockets does a pentagram have?
Common pentagrams have 2 sockets, rare ones roll 3 (70%) or 4 (30%), unique ones have 4. A rank-N errtel can only be mounted in socket N.
What is the difference between errtel rank and level?
Rank (1-5) decides which socket the errtel fits and which option group it has; it is raised with Spirit Powder at Adniel. Level (+0 to +10) scales the value of the options and is raised with Elemental Runes.
How much does it cost to max an errtel?
On this server 34 Elemental Runes and 3.3 million Zen for +0 to +10, and 19 Spirit Powder plus 550,000 Zen to go from rank 1 to rank 5.
What are the enhanced pentagram options?
Fixed bonus lines on rare and unique pentagrams (Pentagram DMG +10%, Elemental Critical DMG Rate +25%, Perfect Dodge +5% and so on) that only activate when the sockets hold errtels of the required type, rank and level.
Can I change a pentagram element?
Yes, with a Talisman of Element Change at Adniel, at 100% success on the default configuration.