Underground Labyrinth · Stage 73
Underground B73F
地底73層
Underground B73F is a Battle Cats stage in Underground Labyrinth: The Grand Deep. It costs 50 energy and sends 7 enemy spawn lines — led by Le'Solar as the boss — against a 800,000 HP enemy base, and clearing it rewards 2,820 XP. Its enemies carry the Alien trait, so cats that target it do the most work here.
Data updated: 2026-08-31
50Energy Cost
2,820XP Reward
800,000Enemy Base HP
5,000Stage Length
20Max Enemies
9.4Difficulty
Enemy spawns (7)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Shibalien Elite | 2300% | 3 | 16.7s | 20s~26.7s | 100% | — |
| Shibalien Elite | 2300% | 2 | 43.3s | 6.7s~13.3s | 100% | — |
| Shibalien Elite | 2300% | 3 | 13.3s | 20s~23.3s | 99% | — |
 Star Peng | 2300% | 1 | -16.7s | — | 99% | — |
| Shibalien Elite | 2300% | ∞ | -100s | 26.7s~30s | 99% | — |
 Project A | 2300% | 1 | 0.1s | — | 99% | — |
 Le'Solar | 2300% | 1 | 0.1s | — | 99% | Boss |