Uncanny Legends · Stage 5
Concrete Ocean
コンクリートオーシャン
Concrete Ocean is a Battle Cats stage in Neo-Necropolis. It costs 180 energy and sends 11 enemy spawn lines — led by Otta-smack-u as the boss — against a 1,000,000 HP enemy base, and clearing it rewards 289,332 XP. Its enemies carry the Black and Red traits, so cats that target them do the most work here.
Data updated: 2026-08-31
180Energy Cost
289,332XP Reward
1,000,000Enemy Base HP
4,600Stage Length
12Max Enemies
10.2Difficulty
Enemy spawns (11)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Otta-smack-u | 800% | ∞ | 24s | 32s~53.3s | 100% | — |
| Otta-smack-u | 800% | 3 | 0s | 26s~34.7s | 99% | — |
| Otta-smack-u | 800% | 3 | 0s | 26s~34.7s | 99% | — |
| Otta-smack-u | 800% | 3 | 0s | 26s~34.7s | 99% | — |
 Dark Otter | 250% | 3 | 0s | 26s~34.7s | 99% | — |
| Dark Otter | 250% | 3 | 0s | 26s~34.7s | 99% | — |
 Kang Roo | 4000% | 1 | 0s | — | 100% | — |
| Kang Roo | 4000% | 1 | 12s | — | 100% | — |
 Shadow Boxer K | 300% | 3 | 0s | 26s~34.7s | 99% | — |
 Capy | 150% | 5 | 0s | 17.3s~26s | 99% | — |
| Otta-smack-u | 100% | 1 | 0s | — | 99% | Boss |