⚔️ Bosses
Lostpiece bosses are split between private arena bosses and open-world minibosses. Arena bosses use keys and reward chests, while open-world bosses have their own rare drops.
⚠️ Good to know: most boss content revolves around keys, arenas, and progression drops, so always check the entry cost before burning your materials.
🗝️ Boss Keys & Arena Entry
Arena bosses require their matching boss key. When you enter an arena fight:
- one boss key is consumed,
- the fight starts through the Boss Fight NPC/arena system,
- victory creates a reward chest,
- the reward phase gives XP, coins, and boss-specific rolls,
- after the reward phase, you are returned after a short delay.
There is no normal player command for boss entry. Use the Boss Fight NPCs and the required keys.
🛠️ Boss Key Crafting
Later boss keys use island fragments.
| Key | Cost |
|---|---|
| Wapol Key | 32 Wapol Fragments |
| Crocodile Key | 32 Crocodile Fragments |
| Enel Key | 64 Enel Fragments |
| Franky Key | 80 Franky Fragments |
| Rayleigh Key | 128 Rayleigh Fragments |
🎁 Arena Rewards
The table below uses the executed reward configuration, not old display text.
| Boss | XP/Coin Pickups | Main Reward Rolls |
|---|---|---|
| Axe Hand Morgan | 1 | Armor part 25%; Cutlass 50%; Axe Hand item 20% |
| Buggy | 2 | Armor part 10%; Buggy Knives 15%; Chop Fruit 2% |
| Don Krieg | 3 | Armor part 10%; Gin Tonfa 20%; Don Krieg Spear 5% |
| Arlong | 4 | Armor/part rolls 50% and 75%; Kiribachi 7% |
| Smoker | 5 | Armor part 10%; Jitte 4%; Smoke Fruit 1% |
| Wapol | 6 | Dark Steel rolls 25% and 75%; Wapol Leggings 2% |
| Crocodile | 7 | Sand Fragment 100%; Crocodile Hook 2%; Sand Fruit 1% |
| Enel | 8 | Lightning Shards 100%; Enel Trident 1%; Lightning Fruit 0.5% |
| Franky | 9 | Packed Birch 100%; Packed Dark Oak 50%; Ship Core 1% |
| Rayleigh | 13 | Haki Fragment 100%; Rayleigh Sword 0.1%; Conqueror's Token 0.1% |
📊 Boss Stats
| Boss | Island / Route | Level | Health |
|---|---|---|---|
| Axe Hand Morgan | Shell Town | 10 | 360 |
| Cabaji | Orange Town | 15 | 125 |
| Buggy | Orange Town | 20 | 720 |
| Gin | Baratie | 25 | 225 |
| Don Krieg | Baratie | 30 | 1,200 |
| Hatchan | Arlong Park | 35 | 480 |
| Arlong | Arlong Park | 40 | 1,400 |
| Tashigi | Logue Town | 45 | 600 |
| Smoker | Logue Town | 50 | 1,800 |
| Dalton | Drum Island | 60 | 900 |
| Wapol | Drum Island | 65 | 2,200 |
| Mr. 5 | Alabasta | 75 | 1,300 |
| Miss Valentine | Alabasta | 75 | 1,300 |
| Mr. 1 | Alabasta | 75 | 1,500 |
| Crocodile | Alabasta | 80 | 2,800 |
| Gedatsu / Shura / Satori / Ohm | Skypiea | 90 | 2,000 each |
| Enel | Skypiea | 95 | 5,000 |
| Franky | Water 7 | 110 | 7,500 |
| Jabra / Kaku | Enies Lobby | 120 | 3,000 each |
| Rob Lucci | Enies Lobby | 125 | 100,000 |
| Perona | Thriller Bark | 135 | 3,350 |
| Ryuma | Thriller Bark | 135 | 3,660 |
| Rayleigh | Amazon Lily route | 160 | 40,000 |
🌍 Open-World Miniboss Drops
| Boss | Rare Drops |
|---|---|
| Miss Valentine | Kilo Fruit 1/500 |
| Mr. 5 | Bomb Fruit 1/500 |
| Mr. 1 | Reset Token 1/100 |
| Kumadori | Finger Pistol 1/100 |
| Blueno | Shave 1/100 |
| Jabra | Iron Body 1/100 |
| Kaku | Tempest Kick 1/100 |
| Ryuma | Shusui 1/1,000 |
| Perona | Ghost Fruit 1/300 |
| Pacifista | 1–3 Light Shards |
⚡ Combat XP
Any Mob kill gives Combat XP based on the mob's level. Franky's Cola gives a 20% Combat XP boost.
💡 Quick Advice
Boss reward chests and open-world rare drops are separate systems. Do not assume a boss has the same drop table in every context.