Grade chances and bonuses
| Grade | Chance (per stat) | Bonus over base |
|---|---|---|
| Z | 0.2% | +35% |
| S | 1.3% | +30–33% |
| A | 7.2% | +24–28% |
| B | 41% | +19–22% |
| C | 41% | +13–17% |
| D | 7.2% | +7–11% |
| E | 1.3% | +2–6% |
| F | 0.2% | base (+0%) |
The three stats roll independently. Grades also show + or − (BMO’s B+ damage was +22%, B− SPA +19%), so “+” seems to be the top of each band. Chances and bonuses come from the in-game screen (one source, ⚠️); the grade order and “F is the hero’s base” are confirmed by video guides.
How to reroll
- Go to the Reconditioning Chamber next to Castle Lemongrab.
- Full reroll — 1 Juice: all three stats roll again.
- Lock one stat — 2 Juice: keep your best stat and reroll the other two. Only one stat can be locked.
There’s no pity. Juice comes from Dungeon Train first wins (2 each rotation), quests, the 7-day login streak (20 in total), the RELEASE code (5) and the shop.
What’s worth chasing
| Goal (one stat) | 50% chance | 90% chance |
|---|---|---|
| Z | 347 rolls | 1,151 rolls |
| S or Z | 46 rolls | 153 rolls |
| A or better | 8 rolls | 26 rolls |
A practical plan: full-reroll (1 Juice) until one stat hits A or better, lock it, then use 2-Juice rerolls only on your main damage dealer. Damage is usually the stat to lock first; Range matters more for units that struggle to reach the path.
Stat grades stack with traits — a Z damage grade (+35%) plus Hero of Ooo (+30%) is a big jump on an evolved Mythic.