Main Chapters · Stage 6
Mercury
水星
Mercury is a Battle Cats stage in Cats of the Cosmos Ch. 2. It costs 64 energy and sends 12 enemy spawn lines against a 330,000 HP enemy base, and clearing it rewards 2,500 XP. Its enemies carry the Alien trait, so cats that target it do the most work here.
Data updated: 2026-08-31
64Energy Cost
2,500XP Reward
330,000Enemy Base HP
4,800Stage Length
15Max Enemies
8.2Difficulty
Enemy spawns (12)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Kang Roo | 2000% | 5 | 6.7s | 20s~30s | 100% | — |
 Squire Rel | 2000% | 10 | 8.3s | 3.3s~6.7s | 100% | — |
| Squire Rel | 2000% | 10 | 10s | 3.3s~6.7s | 100% | — |
 Croco | 2000% | ∞ | 16.7s | 6.7s~10s | 100% | — |
 UltraBaaBaa | 100% | 5 | 26.7s | 16.7s~20s | 100% | — |
 Shibalien Elite | 150% | 1 | 33.3s | — | 100% | — |
| Shibalien Elite | 150% | 1 | 60s | — | 100% | — |
| Shibalien Elite | 150% | 1 | 66.7s | — | 100% | — |
| Shibalien Elite | 150% | ∞ | 16.7s | 33.3s~50s | 100% | — |
 Star Peng | 150% | 1 | 36.7s | — | 100% | — |
| Star Peng | 150% | 1 | 63.3s | — | 100% | — |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |