- Crystal Defense is available at the Punch Island of Sailor Piece Sea 2.
- Players need to farm Crystal Keys and use them to enter Crystal Defense.
- From the Crystal Defense, players can farm Crystal Coins, Anti Magic sword, Demon Wings accessory, and Demon Dweller title.
Crystal Defense is an exclusive late-game mode where players can farm unique currency and unlock rare items. Restricted entirely to veterans who have reached Sea 2, this challenging arena is where the real endgame begins. If you want to master the grind and see everything this mode has to offer, here is our complete guide on how Crystal Defense in Sailor Piece works.
Where Is Crystal Defense Located in Sailor Piece?
Crystal Defense is located in the Punch Island of Sailor Piece. To get there, unlock Sea 2 in Sailor Piece and use the portal. Once in the Island, take the road on the left where you find the Fast Ninja NPCs. Walk straight past them to find the Crystal Defense NPCs. This is exactly North-West of the Cosmic Being World Boss.

How to Enter Crystal Defense in Sailor Piece
To enter Crystal Defense mode in Sailor Piece, you will need Crystal Keys. You can only obtain the keys by defeating all NPCs on the Sea 2 of Sailor Piece. Once you have a key, head toward the Crystal Defense NPC in the Punch Island and interact with the NPC on the right side.
After interacting, click the Spawn button to open the Crystal Defense portal. The run starts automatically after the timer. You can enter right away by clicking the Start button.


If it is not the portal you spawned, go near the portal and hold E to enter Crystal Defense in Sailor Piece with the host. Up to 4 players can enter a Crystal Defense at once.
Sailor Piece Crystal Defense Mode Explained
Now that you know how to start the Crystal Defense run, here is how the game mode works in Sailor Piece:
- When you enter Crystal Defense, you must vote to start the run. So prepare your best damage build in Sailor Piece before voting.
- The main goal of Crystal Defense is defending the crystal at the center. It spawns with a 100% HP and all NPCs and bosses rush toward it to deal damage. You must defeat them before they can deal damage.
- Each level applies random debuff. This includes half ability damage, higher cooldown, and more.
- After every 5 level a boss appears with the chance to drop the Anti Magic sword, Demon Wings accessory, and Demon Dweller title. The drop chances depend on your luck stat in the game.
- When the crystal is destroyed, the run fails and a prompt appears to restart Crystal Defense. To restart, you must spend 1x Crystal Key. You can turn auto spawn on from the settings option by typing in the level.
- For wave you clear, you can earn 1-4 Crystal Coins. Improved luck stat help you earn more coins.

What All You Can Buy with Crystal Coins in Sailor Piece?
Crystal Defense is the only place where you can farm Crystal Coins. So, once you farmed enough coins, you must wonder where to spend them. Well, the Crystal Coins are use for shopping exclusive items, rerolls, or upgrades in Sailor Piece. Here is the full breakdown:
Crystal Defense Merchant Shop
Most players who are unlucky like me can use the Crystal Defense merchant to purchase the Anti Magic sword. But that is not everything you get from this NPC shop. Here is the list of Sailor Piece items you can get from the Crystal Defense Merchant shop by using Crystal Coins.
| Item | Price (Crystal Coins) |
|---|---|
| Common Chest | 1 |
| Rare Chest | 5 |
| Epic Chest | 12 |
| Legendary Chest | 25 |
| Mythical Chest | 65 |
| Secret Chest | 500 |
| Aura Crate | 1,000 |
| Cosmetic Crate | 1,400 |
| Boss Key | 3 |
| Dungeon Key | 3 |
| Tower Key | 8 |
| Trait Reroll | 4 |
| Race Reroll | 4 |
| Clan Reroll | 9 |
| Bloodline Stone | 14 |
| Destroyer Aura | 2,000 |
| Clover Outfit | 850 |
| Anti Magic | 5,000 |
Crystal Defense Upgrades Shop
If you already have the Anti Magic sword, the Crystal Defense upgrades are the next best place to spend Crystal Coins. The NPC that lets you upgrade stats is located beside the Crystal Merchant. You will need a total of 43,350 Crystal Coins in Sailor Piece to max all the stats.
That said, here is the full Crystal Defense upgrade breakdown:
| Stat | L1 | L2 | L3 | L4 | L5 | Total Cost | Max Stat Value |
|---|---|---|---|---|---|---|---|
| Damage | 850 | 1,150 | 1,500 | 2,000 | 3,000 | 8,500 | 25% (+5%/level) |
| Critical Damage | 850 | 1,150 | 1,500 | 2,000 | 3,000 | 8,500 | 15% (+3%/level) |
| Critical Chance | 850 | 1,150 | 1,500 | 2,000 | 3,000 | 8,500 | 5% (+1%/level) |
| HP | 600 | 750 | 1,000 | 1,250 | 1,750 | 5,350 | 37.5% (+7.5%/level) |
| Luck | 1,250 | 1,750 | 2,250 | 3,000 | 4,250 | 12,500 | 15% (+3%/level) |
Best Tips and Tricks to Clear More Crystal Defense Floors
Crystal Defense floors get hard quickly and you will have a tough time going through it. To help you out, we have the best tips and tricks that will help you clear Crystal Defense floors faster:
- Use swords or melee styles in Sailor Piece that deal AOE damage. This will help you clear waves with one ability in the earlier stages.
- Weapons like The World and Ice Queen are ideal as they push enemies back. This tech will be useful for dealing with the bosses with higher HP.
- Check how many floors you can clear and auto restart on that level. This will let AFK the Crystal Defense without thinking about actively restarting the run. Just make sure you farm enough Crystal Keys first.
Are you jumping into the Crystal Defense mode in Sailor Piece after going through our guide? Which relics in Sailor Piece are you using to improve your luck or damage? Let us know in the comments.
There are two ways to get the Anti Magic sword in Sailor Piece. You can either get it as a lucky drop from the bosses that spawn every 5 levels in the Crystal Defense mode, or you can buy it directly from the Crystal Defense Merchant on Punch Island for 5,000 Crystal Coins.
Crystal Coins are an exclusive currency earned by clearing waves in the Crystal Defense mode. You can spend them at the Crystal Defense Merchant for items like chests, rerolls, and the Destroyer Aura, or use them at the Upgrades Shop to permanently max out your Damage, Critical Chance, HP, and Luck stats (which costs a total of 43,350 coins).
