Underground Labyrinth · Stage 37
Underground B37F
地底37層
Underground B37F is a Battle Cats stage in Underground Labyrinth: The Grand Deep. It costs 40 energy and sends 5 enemy spawn lines — led by Le'noir as the boss — against a 600,000 HP enemy base, and clearing it rewards 2,256 XP. Its enemies carry the Black 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
4,700Stage Length
10Max Enemies
9.1Difficulty
Enemy spawns (5)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Dark Otter | 150% | 1 | 16.7s | — | 100% | — |
 Doge Dark | 800% | 2 | 26.7s | 16.7s~20s | 100% | — |
| Doge Dark | 800% | ∞ | 26.7s | 16.7s~20s | 99% | — |
 Gory Dark | 300% | 4 | 6.7s | 23.3s~30s | 99% | — |
 Le'noir | 150% | 1 | 86.7s | — | 99% | Boss |