Main Chapters · Stage 15
Cats of the Cosmos Ch. 2 — Stage 15
卵星雲
Cats of the Cosmos Ch. 2 — Stage 15 is a Battle Cats stage in Cats of the Cosmos Ch. 2. It costs 75 energy and sends 6 enemy spawn lines — led by Ursamajor as the boss — against a 385,000 HP enemy base, and clearing it rewards 5,200 XP. Its enemies carry the Alien trait, so cats that target it do the most work here.
Data updated: 2026-08-31
75Energy Cost
5,200XP Reward
385,000Enemy Base HP
4,200Stage Length
10Max Enemies
8.3Difficulty
Enemy spawns (6)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Ursamajor | 800% | 1 | 26.7s | — | 100% | Boss |
 UltraBaaBaa | 100% | 5 | 10s | 13.3s~16.7s | 100% | — |
 Kroxo | 1200% | 5 | 16.7s | 16.7s | 100% | — |
 Squire Rel | 3000% | 8 | 20s | 13.3s~16.7s | 100% | — |
 Star Peng | 200% | 1 | 80s | — | 100% | — |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |