Rank System
Pet ranks from E to SS — index scores, max level, and mutation bonuses
Rank System
Every pet has a Rank from E (weakest) to S (strongest). A pet's maximum level depends on its Rank, and the Rank also determines its Index Score — a value used to calculate the probability of obtaining specific evolutions when used as a secondary item.
Rank Progression
Starting rank. All pets begin here.
Catch wild pets to gain XP toward rank-up.
First rank-up. Slightly increased stats.
Keep leveling up — feeding items speeds this up.
Mid-range rank. Good for early game.
C-rank pets are solid for mid-game content.
Strong rank. Noticeable power spike.
B-rank is where pets start feeling impactful in combat.
High rank. Excellent for boss fights.
A-rank pets are viable for most endgame content.
Elite rank — highest standard grade in-game.
S-rank pets are meta — great for Endless Spire.
Mutation Index Bonuses
Pets with Shiny or Huge mutations gain bonus Index Score, making them even more effective as secondary items in evolution recipes.
Shiny mutation adds +2 to the pet's index score, increasing evolution probability.
Huge mutation adds +3 to the pet's index score, the highest bonus available.
Complete Index Score Table
| Rank / Mutation | Index Score |
|---|---|
E Rank E | 3 |
D Rank D | 4 |
C Rank C | 5 |
B Rank B | 6 |
A Rank A | 7 |
S Rank S | 9 |
✨ Shiny Mutation | +2 |
💪 Huge Mutation | +3 |