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Overview
Mastery System
- Mastery System is a Sea 2 system guide in Sailor Piece.
- The Mastery System was added in the Ghoul Update.
Section
How Mastery works
- Open the Mastery menu from Starter Island Sea 2, or use the inventory button to access it directly.
- Equip the Melee, Sword, or Fruit you want to train.
- Only the Melee, Sword, or Fruit you are currently using contributes active Mastery stats.
- Kills are tracked on the equipped Melee, Sword, or Fruit , not as one shared universal level.
- Kills contribute Mastery XP / kill credit based on enemy type: normal NPCs count as 1, normal bosses as 3, world bosses and Sea Beasts as 75, and raid bosses as 100.
- After reaching a reward milestone, claim the bonus from the Mastery menu or it will not work on that Melee, Sword, or Fruit .
- For active build math, the maximum active Mastery coverage is one currently used item. Luck, Damage, Crit Chance, Crit Damage, and the level 500 passive should be counted from that item only.
- The maximum visible Mastery Point cap is 500 MP.
Section
Mastery XP per kill
| Kill type | Mastery XP | Counts as |
|---|---|---|
| Normal NPC | 1 | 1 kill credit |
| Normal boss | 3 | 3 kill credit |
| World boss | 75 | 75 kill credit |
| Sea Beast | 75 | 75 kill credit |
| Raid boss | 100 | 100 kill credit |
Section
Mastery scaling by MP band
| MP range | Kills / credit per +1 MP | Total by end of band |
|---|---|---|
| 0 MP to 50 MP | 25 | 1,250 |
| 50 MP to 100 MP | 35 | 3,000 |
| 100 MP to 150 MP | 50 | 5,500 |
| 150 MP to 200 MP | 65 | 8,750 |
| 200 MP to 250 MP | 75 | 12,500 |
| 250 MP to 300 MP | 100 | 17,500 |
| 300 MP to 350 MP | 150 | 25,000 |
| 350 MP to 400 MP | 150 | 32,500 |
| 400 MP to 450 MP | 175 | 41,250 |
| 450 MP to 500 MP | 175 | 50,000 |
Section
Mastery reward milestones
| Mastery level | Mastery XP / kill credit needed | Reward |
|---|---|---|
| 25 | 625 XP | +7% Luck |
| 50 | 1,250 XP, then 35 XP per next MP | +7% Damage |
| 100 | 3,000 XP, then 50 XP per next MP | +1% Crit Chance |
| 150 | 5,500 XP, then 65 XP per next MP | +10% Crit Damage |
| 200 | 8,750 XP, then 75 XP per next MP | +10% Luck |
| 250 | 12,500 XP, then 100 XP per next MP | +10% Damage |
| 300 | 17,500 XP, then 150 XP per next MP | +1% Crit Chance |
| 350 | 25,000 XP, then 150 XP per next MP | +15% Crit Damage |
| 400 | 32,500 XP, then 175 XP per next MP | +15% Luck |
| 450 | 41,250 XP, then 175 XP per next MP | +15% Damage |
| 500 | 50,000 XP | Passive: 25% chance for 1.5x DMG |
Section
Max Mastery totals and stacking
| Stat or rule | Total from level 500 Mastery |
|---|---|
| Damage | +32.5% by 450 MP |
| Luck | +32.5% by 400 MP |
| Crit Chance | +2% |
| Crit Damage | +25% |
| Passive | 25% chance for 1.5x DMG |
| Active slot cap | At most 1 maxed mastery can contribute active stats at a time: the Melee, Sword, or Fruit currently being used |
| Luck stacking rule | Luck does not stack across Melee, Sword, and Fruit. Count +32.5% Luck at most from the currently used item after the 25 MP, 200 MP, and 400 MP Luck rewards are claimed. |
| Other Mastery stats | Damage, Crit Chance, Crit Damage, Luck, and the level 500 passive should be counted from the item currently held, not tripled across all 3 slots |
| Claim requirement | Claim the Mastery bonuses from the Mastery menu before counting them in build stats |
Section
Mastery requirement math
| Target | Formula | Total Mastery XP |
|---|---|---|
| +1 Mastery level | Early levels | 25 XP |
| First reward at level 25 | 25 x 25 XP | 625 XP |
| Level 50 breakpoint | Level 50 requires 35 XP for the next Mastery level | 1,250 XP to reach level 50 if levels 1 to 50 stay at 25 XP each |
| Level 100 breakpoint | Level 100 requires 50 XP for the next Mastery level | 3,000 XP to reach level 100 if levels 50 to 99 stay at 35 XP each |
| Level 150 breakpoint | Level 150 requires 65 XP for the next Mastery level | 5,500 XP to reach level 150 if levels 100 to 149 stay at 50 XP each |
| Level 250 breakpoint | Level 250 requires 100 XP for the next Mastery level | 12,500 XP to reach level 250 |
| Full cap at level 500 | 50 x (25 + 35 + 50 + 65 + 75 + 100 + 150 + 150 + 175 + 175) | 50,000 XP |
Section
2x Mastery gamepass
| Product | Price | Use |
|---|---|---|
| 2x Mastery | 699 Robux | Shop gamepass for faster Mastery progress |
How many kills does it take to fully master one Melee, Sword, or Fruit?
A normal NPC-only grind takes 50,000 kills / Mastery XP to reach 500 MP. Level 250 is 12,500 kills / Mastery XP. Normal NPCs give 1 XP, normal bosses give 3, world bosses and Sea Beasts give 75, and raid bosses give 100 per kill, so higher-credit kills can reduce the literal kill count.
What does level 500 Mastery give?
A level 500 mastered Melee, Sword, or Fruit gives +32.5% Damage, +32.5% Luck, +2% Crit Chance, +25% Crit Damage, and a passive with 25% chance for 1.5x DMG, but the bonuses must be claimed from the Mastery menu before they work.
Do Melee, Sword, and Fruit Mastery bonuses stack?
No. Only the Melee, Sword, or Fruit you are currently using contributes active Mastery stats. Luck no longer stacks across all 3 equipped slots, so max Mastery Luck is +32.5% from the current item.
Why are my Mastery bonuses not working?
Open the Mastery menu and claim the earned bonus for that equipped Melee, Sword, or Fruit. Earned Mastery milestones do not apply until they are claimed.
Is Mastery account-wide?
No. Mastery is tracked per equipped Melee, Sword, or Fruit instead of as one shared account-wide level. Only the currently used item contributes active Mastery stats after its rewards are claimed.
Where do you open the Mastery System?
The Mastery System can be accessed from Starter Island Sea 2 or directly from the inventory button.