

Crystal Defense
Crystal Defense wave mode on Punch Island. Crystal Coins, Demon Wing accessory, Anti Magic sword, and Defense Merchant shop.
Crystal Defense is a wave-based survival mode on Punch Island in Sea 2. A Crystal Key gets you in, and Crystal Coins drop every wave. The mode also has a boss that spawns every 5 waves, dropping the Demon Wing accessory and (rarely) the Anti Magic sword.
How to Enter
| Field | Value |
|---|---|
| Location | Back of Punch Island (Sea 2) |
| Entry cost | 1 Crystal Key per run |
| Crystal Key source | Sea 2 NPC drops |
Wave Rewards
Crystal Coins drop every wave. Lower waves give around 3 Crystal Coins each. The coin payout increases with wave depth.
Boss Spawn
A boss spawns every 5 waves. The boss drops the Demon Wing accessory and can rarely drop the Anti Magic sword directly.
| Drop | Estimated Rate (100% luck) | Notes |
|---|---|---|
| Demon Wing | 0.060%-0.080% | Best-in-slot accessory |
| Anti Magic sword | 0.048%-0.064% | Direct sword drop, bypasses shop |
Defense Merchant Shop
Crystal Coins can also be spent at the Defense Merchant for guaranteed purchases.
| Item | Cost | Type |
|---|---|---|
| Anti Magic sword | 5,000 Crystal Coins | Endgame sword (Asta theme) |
| Clover Outfit | 850 Crystal Coins | Mythical accessory (100% DMG, 120% DEF, 15% DR) |
Tips
- Crystal Defense is the only source for Anti Magic and Demon Wing outside of trading.
- The boss every 5 waves is the main reason to push deeper rather than resetting early.
- Luck affects drop rates on the boss, so bring a luck build if farming for Demon Wing or Anti Magic.

Know something we don't?
Help improve this page — submit a tip, correction, or new info. No account needed.
