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Last updated: July 21, 2026
On this page: All Wing Cores and Compatibility · How to Craft a Wing Core · Wing Core Options · Upgrading Wing Cores to +15 · How to Equip and Remove Wing Cores · Are Wing Cores Worth It? · Related Guides · FAQ · Upcoming & New Mu Online Private Servers in 2026
MU Online Wing Cores Guide – Crafting, Upgrading & Options
Wing Cores are socketable upgrade items exclusive to Lv. 5 wings, introduced in Season 19 Part 2. Think of them as a jewel socket for your endgame wings: each core adds flat attack / wizardry / curse damage (+50 at +0, scaling to +273 at +15) plus up to two random elemental options — and unlike everything else in MU Online, cores are never destroyed on a failed upgrade.
This guide covers all ten Pure Wing Cores, exactly how to craft them, the full +1 to +15 upgrade table with costs, and which wings each core fits.
All Wing Cores and Compatibility
| Image | Wing Core (Type 1) | Fits these Lv. 5 wings |
|---|---|---|
 | Pure Virtue Wing Core | Wings of Virtue (Integrity), Cloak of Glory, Wings of Eternity, Cloak of Perfection |
 | Pure Destruction Wing Core | Wings of Destruction, Cloak of Oath, Crimson Wings |
 | Pure Phantom Wing Core (Illusion Core) | Wings of Fantasy (Illusion), Wings of Inevitability |
 | Pure Punishment Wing Core | Wings of Punishment, Cloak of Authority, Cloak of Glory |
 | Pure Barrier Wing Core | Wings of Barrier, Cloak of Discipline (Training) |
 | Pure Inevitability Wing Core | Wings of Fantasy (Illusion), Wings of Inevitability, Wings of Wisdom |
 | Pure Eye Wing Core (Lilac Core) | Wings of Barrier, Cloak of Discipline, Wings of Lilac |
 | Pure Crimson Wing Core | Wings of Destruction, Wings of Punishment, Cloak of Oath, Crimson Wings |
 | Pure Eternal Wing Core (Eternity Core) | Wings of Virtue, Cloak of Authority, Wings of Eternity, Cloak of Perfection |
 | Pure Hyean's Wing Core (Wisdom Core) | Wings of Inevitability, Wings of Wisdom |
Compatibility lists can differ slightly between game versions — always check the core's in-game description before crafting. Names in italics are alternative names used on official servers.
How to Craft a Wing Core
| Item | Details |
|---|---|
 Pure Wing Core Blueprint (Type 1) | Ruud Shop — 50,000 Ruud |
| Combination materials | Blueprint + Jewel of Bless ×100 + Jewel of Soul ×100 + Jewel of Creation ×100 + Jewel of Chaos ×100 +  Feather of Uriel ×50 + 20,000,000 Zen |
| Success chance | 70% |
| Result | A random core type with random options — you cannot choose which core you get |
Wing Core Options
| Option type | At +0 | At +15 |
|---|---|---|
| Basic option | Attack / Wizardry / Curse +50 | Attack / Wizardry / Curse +273 |
| Random options (0–2, rolled at craft) | Elemental ATK +170, Elemental DEF +100, Elemental ATK/DEF success rate +125, Elemental ATK (II) +240, Elemental DEF (II) +210, Elemental success rates (II) +200, Extra Nuke DMG +120, Extra Bolt DMG +80, Extra Wide DMG +40, Extra DMG Reduction +50 | |
The random options plug directly into the elemental (Pentagram) system, which makes a well-rolled core a massive PvP upgrade — a core with double elemental attack options is worth far more than its crafting cost on any active server.
Upgrading Wing Cores to +15
Cores are upgraded at the Chaos Goblin in Noria with 
Wing Core Upgrade Stones (Ruud Shop, 1,200 Ruud each):
| Upgrade to | Stones | Zen | Chance |
|---|---|---|---|
| +1 | 1 stone | 1,000,000 Zen | 90% |
| +2 | 2 stones | 1,500,000 Zen | 90% |
| +3 | 2 stones | 2,000,000 Zen | 90% |
| +4 | 2 stones | 2,500,000 Zen | 90% |
| +5 | 3 stones | 3,000,000 Zen | 90% |
| +6 | 3 stones | 3,500,000 Zen | 90% |
| +7 | 4 stones | 4,000,000 Zen | 90% |
| +8 | 4 stones | 4,500,000 Zen | 80% |
| +9 | 4 stones | 5,000,000 Zen | 80% |
| +10 | 5 stones | 5,500,000 Zen | 75% |
| +11 | 5 stones | 6,000,000 Zen | 75% |
| +12 | 5 stones | 6,500,000 Zen | 70% |
| +13 | 5 stones | 7,000,000 Zen | 70% |
| +14 | 5 stones | 7,500,000 Zen | 65% |
| +15 | 5 stones | 8,000,000 Zen | 65% |
How to Equip and Remove Wing Cores
Alt + right-click a Lv. 5 wing in your inventory to open the Lv. 5 Wings UI, then drag the core into the socket. Cores can only be socketed and removed while the wing is in your inventory, not while equipped. To remove a core, right-click it or drag it back out of the UI — removal is free and the core is not lost.
Are Wing Cores Worth It?
Yes — once you own Lv. 5 wings, cores are the single best Ruud investment in the game. The blueprint route costs about 50,000 Ruud plus 400 jewels per attempt at 70%, and even a +0 core with a good elemental roll outperforms most pentagram upgrades. Upgrade stones are cheap through +7 (guaranteed-ish at 90%), so a realistic budget target for most players is a +7 core with one or two elemental options; push to +15 only when Ruud stops being a bottleneck.
Related Guides
Wing Cores only work with 5th level wings — see that guide for the full Lv. 5 crafting recipe. The complete wing path: small wings → 1st → 2nd → 2.5 → 3rd → 4th → 5th level wings.
Continue Reading
Wing Cores live inside the wider Lv. 5 ecosystem:
| Guide | Why it helps |
|---|---|
| All MU Online wings | The complete wings overview — every tier and every class on one page. |
| The wings that hold them | Full Lv. 5 wings guide: stats at +0 and +15, Damage Correction and the two-stage craft. |
| 5th Wing Relic | The Divine Object recipe both Lv. 5 wings and core farming revolve around — shared Feather of Uriel costs. |
| Not at Lv. 5 yet? | 4th level wings carry you from 800 to 1200 — craft routes and all class wings. |
| Talisman overview | Every result-fixing and chance-boosting talisman in the wing system compared. |
FAQ
Can I choose which core I craft?
No — the blueprint combination produces a random core type with random options. Trade with other players for the core your wings need.
Can a core be destroyed?
Never. Failed upgrades only lower the level (+1–+7) or reset it (+8–+15).
How many cores can one wing hold?
One core per Lv. 5 wing on standard settings.
Where do Feathers of Uriel come from?
Rare drops in Elite Zones — the same material used for the Lv. 5 wing craft itself.
Do Wing Cores work on 4th level wings?
No — cores are exclusive to Lv. 5 wings and capes.