Towers · Stage 21
Floor 21
21階
Floor 21 is a Battle Cats stage in Heavenly Tower. It costs 200 energy and sends 11 enemy spawn lines — led by Red Cyclone as the boss — against a 530,000 HP enemy base, and clearing it rewards 17,860 XP. Its enemies carry the Red and Floating traits, so cats that target them do the most work here.
Data updated: 2026-08-31
200Energy Cost
17,860XP Reward
530,000Enemy Base HP
5,000Stage Length
10Max Enemies
9.1Difficulty
Enemy spawns (11)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Those Guys | 2000% | ∞ | 0s | 2s~6s | 100% | — |
 B.B.Bunny | 2400% | 10 | 3.3s | 1.3s~3.3s | 100% | — |
 Shy Boy | 1800% | 2 | 13.3s | 3.3s~6.7s | 100% | — |
 St. Pigge the 2nd | 800% | 1 | 10s | — | 100% | — |
 Capy | 100% | 4 | 0s | 1.7s | 99% | — |
| B.B.Bunny | 2400% | 6 | 0s | 1.3s~2s | 99% | — |
 Christmas D. | 400% | 3 | 0s | 93.3s~94s | 99% | — |
| Christmas D. | 400% | 3 | 0s | 93.3s~94s | 99% | — |
| B.B.Bunny | 2400% | ∞ | 0s | 66.7s~67.3s | 99% | — |
 Red Cyclone | 200% | 1 | 0s | — | 99% | Boss |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |