Collaboration Stages · Stage 2
Lower Rank Five - Rui (Insane)
下弦の伍・累 超激ムズ
Lower Rank Five - Rui (Insane) is a Battle Cats stage in Mission: Slay Rui!. It costs 150 energy and sends 9 enemy spawn lines — led by Rui as the boss — against a 500,000 HP enemy base, and clearing it rewards 21,150 XP. Its enemies carry the Angel trait, so cats that target it do the most work here.
Data updated: 2026-08-31
150Energy Cost
21,150XP Reward
500,000Enemy Base HP
5,000Stage Length
15Max Enemies
7.2Difficulty
Enemy spawns (9)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Celeboodle | 400% | 1 | 6.7s | — | 100% | — |
 Gabriel | 200% | ∞ | 20s | 33.3s~40s | 100% | — |
 Demon Gory | 1200% | 1 | 26.7s | — | 100% | — |
 Rui | 450% | 1 | 0s | — | 99% | Boss |
 Heavenly Hippoe | 200% | 2 | -3.3s | 100s~106.7s | 99% | — |
 Rain D. | 200% | 2 | -10s | 66.7s~73.3s | 99% | — |
| Demon Gory | 1200% | 3 | -26.7s | 33.3s~40s | 99% | — |
 Demon Doge | 1800% | ∞ | -40s | 43.3s~53.3s | 99% | — |
 Ms. Sign | 100% | ∞ | 900s | 900s | 100% | — |