Underground Labyrinth · Stage 52
Underground B52F
地底52層
Underground B52F is a Battle Cats stage in Underground Labyrinth: The Grand Deep. It costs 40 energy and sends 7 enemy spawn lines — led by Helmut Krabbe as the boss — against a 600,000 HP enemy base, and clearing it rewards 2,256 XP. Its enemies carry the Alien trait, so cats that target it do the most work here.
Data updated: 2026-08-31
40Energy Cost
2,256XP Reward
600,000Enemy Base HP
5,000Stage Length
10Max Enemies
9.1Difficulty
Enemy spawns (7)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Helmut Krabbe | 1400% | ∞ | 6.7s | 23.3s~30s | 100% | — |
| Helmut Krabbe | 1400% | 2 | 20s | 6.7s~10s | 100% | — |
 Mistress Celeboodle | 800% | 5 | 26.7s | 23.3s~30s | 99% | — |
| Helmut Krabbe | 100% | 1 | 6.7s | — | 99% | Boss |
| Helmut Krabbe | 1400% | 6 | 6.7s | 6.7s~10s | 99% | — |
 Star Peng | 300% | 5 | 53.3s | 23.3s~26.7s | 99% | — |
 Corporal Weyland | 300% | 2 | 20s | 3.3s~6.7s | 99% | — |