Published: April 20, 2026 
Sailor Piece Boss Rush game mode is a late-game content. If you want a real challenge and to fight the toughest bosses back-to-back, then it's for you. The game mode also rewards various items, such as Gems, Coins, and more, for defeating bosses. In this guide, we will detail everything you need to know about the Sailor Piece Boss Rush game mode.
How to Play Boss Rush Game Mode
To play the Boss Rush game mode, you must teleport to Sailor Island. Here is a step-by-step guide:
- Enter the main area in Sailor Island and go in the right direction.
- You will see three NPCS: Boss Upgrades, Boss Rush, and the Boss Rush shop.
- Interact with the Boss Rush NPC to open the Boss Rush menu.
- Click the green Spawn button to summon the portal.
- Approach the portal and press the "E" button.
- Click the green Start button to pay one Rush Coin and start the mode.
How to Get Rush Keys
You can get Rush Keys from various sources. Here is the list:
Sailor Piece Boss Rush Game Mode - Explained
After entering the Boss Rush game mode, you can select one of the four difficulties: Easy, Medium, Hard, and Extreme. You must clear 15 waves, each with a boss, to complete the game mode in all difficulties. Each wave lasts 5 minutes, and you must clear them within the given time frame, or you will face defeat.
The boss in each wave will have higher HP than the previous one, so you must equip yourself with the best build to clear the mode comfortably. You can also team up with other players to clear Boss Rush. Keep in mind that, for every additional player, the bosses' HP increases by 55%. Here is the list of bosses' HP in each wave for all difficulties:
| Waves | Easy Boss HP | Medium Boss HP | Hard Boss HP | Extreme Boss HP |
|---|---|---|---|---|
| #1 | 90M | 270M | 675M | 1.8B |
| #2 | 112M | 338M | 844M | 2.25B |
| #3 | 135M | 405M | 1.01B | 2.7B |
| #4 | 180M | 540M | 1.35B | 3.6B |
| #5 | 225M | 675M | 1.69B | 4.5B |
| #6 | 270M | 810M | 2.02B | 5.4B |
| #7 | 315M | 945M | 2.36B | 6.3B |
| #8 | 360M | 1.08B | 2.7B | 7.2B |
| #9 | 450M | 1.35B | 3.38B | 9B |
| #10 | 585M | 1.75B | 4.39B | 11.7B |
| #11 | 720M | 2.16B | 5.4B | 14.4B |
| #12 | 900M | 2.7B | 6.75B | 18B |
| #13 | 1.08B | 3.24B | 8.1B | 21.6B |
| #14 | 1.35B | 4.05B | 10.12B | 27B |
| #15 | 1.8B | 5.4B | 13.5B | 36B |
Each difficulty also has difficulty modifiers, as listed below:
- Easy - Damage Reduction (-35%)
- Medium - Damage Reduction (-70%) and Lifesteal (-50%)
- Hard - Damage Reduction, Lifesteal, and IFrames disabled
- Extreme - Damage Reduction and Lifesteal disabled, and IFrames (2.5 seconds)
Boss Rush Game Mode Rewards
You can get regular items, such as Gems, XP, and Coins, for clearing each wave. You will receive Rush Coins as final rewards based on the time taken to clear the waves. The rewards vary for each difficulty. Here are the details:
| Time Tiers | Required Time | Rush Coins (Easy Difficulty) | Rush Coins (Medium Difficulty) | Rush Coins (Hard Difficulty) | Rush Coins (Extreme Difficulty) |
|---|---|---|---|---|---|
| SSS | 30 seconds or less | 2 to 6 | 3 to 8 | 5 to 10 | 8 to 14 |
| SS | 60 seconds or less | 2 to 5 | 3 to 7 | 4 to 8 | 7 to 12 |
| S | 120 seconds or less | 2 to 4 | 3 to 6 | 3 to 8 | 6 to 11 |
| A | 180 seconds or less | 2 to 4 | 2 to 5 | 3 to 7 | 5 to 9 |
| B | 240 seconds or less | 2 to 3 | 2 to 4 | 3 to 6 | 4 to 8 |
| C | 300 seconds or less | 1 to 3 | 2 to 4 | 3 to 5 | 4 to 7 |
How to Use Rush Coins
You can use Rush Coins in the Boss Rush shop to purchase various items and Boss Rush Upgrades. These NPCs are located on either side of the Boss Rush NPC. Here are the details:
Boss Rush Shop
| Items | Cost (Rush Coins) |
|---|---|
| Sun Armor | 250 |
| Trait Reroll | 2 |
| Clan Reroll | 5 |
| Race Reroll | 2 |
| Boss Key | 1 |
| Dungeon Key | 2 |
| Common Chest | 1 |
| Rare Chest | 3 |
| Epic Chest | 6 |
| Legendary Chest | 15 |
| Mythical Chest | 40 |
| Secret Chest | 400 |
| Aura Crate | 1.2k |
Boss Rush Upgrades
You can upgrade your stats from the Boss Rush Upgrades NPC. Each update costs Rush Coins, and you can upgrade each stat up to five levels. Every level increases your stat by a certain percentage. Here are the details:
| Stats | Level 1 Cost | Level 2 Cost | Level 3 Cost | Level 4 Cost | Level 5 Cost | Stat Increase Per Level |
|---|---|---|---|---|---|---|
| Damage | 100 | 150 | 250 | 350 | 500 | 5% |
| Crit Damage | 100 | 150 | 250 | 350 | 500 | 3% |
| Crit Chance | 100 | 150 | 250 | 350 | 500 | 1% |
| HP% | 75 | 100 | 150 | 200 | 300 | 7.5% |
| Luck | 120 | 200 | 300 | 450 | 650 | 3% |
You need 6,625 Rush Coins in total to max out all stats.
Tips and Tricks for Farming Sailor Piece Boss Rush Mode
You can AFK-farm for Rush Coins in Boss Rush mode with a few tricks, as listed below:
- Team up with two players to farm swiftly. Ensure your team members are at the same level as yours.
- Afk farming in Normal difficulty is optimal. It is relatively quicker to clear Normal difficulty, and you can receive Rush Coins rewards equal to those of Medium.
- Use the Gojo V2 fighting style and spam its "F" move. You can also choose the Gilgamesh fighting style and spam its "V" move.
- It's easier to farm with the Primordial Rune as it increases your damage by 112% at max level. You can farm Primordial Rune in Infinite Tower mode.
That concludes our Sailor Piece Boss Rush guide. We recommend checking our Sailor Piece wiki for more game-related in-depth guides to progress swiftly.
