Underground Labyrinth · Stage 99
Underground B99F
地底99層
Underground B99F is a Battle Cats stage in Underground Labyrinth: The Grand Deep. It costs 500 energy and sends 8 enemy spawn lines — led by Cli-One as the boss — against a 600,000 HP enemy base, and clearing it rewards 2,820 XP. Its enemies carry the Angel, Floating and Alien traits, so cats that target them do the most work here.
Data updated: 2026-08-31
500Energy Cost
2,820XP Reward
600,000Enemy Base HP
4,600Stage Length
30Max Enemies
9.4Difficulty
Enemy spawns (8)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Heavenly Hippoe | 300% | 2 | 16.7s | 20s~26.7s | 100% | — |
 Maawth | 1200% | 1 | 36.7s | — | 100% | — |
 Gabriel | 300% | 2 | 10s | 1s~2s | 99% | — |
| Heavenly Hippoe | 300% | 3 | 16.7s | 36.7s | 99% | — |
| Gabriel | 300% | ∞ | -10s | 30s~36.7s | 99% | — |
 LeMurr | 1200% | 1 | 20s | — | 99% | — |
 Ursamajor | 1400% | 1 | -20s | — | 99% | — |
 Cli-One | 750% | 1 | 166.7s | — | 99% | Boss |