Special Stages · Stage 4

Mutation Lv.4

突然変異Lv.4

Mutation Lv.4 is a Battle Cats stage in Resident Undead. It costs 90 energy and sends 5 enemy spawn lines against a 90,000 HP enemy base, and clearing it rewards 12,690 XP. Its enemies carry the Metal and Zombie traits, so cats that target them do the most work here.

Data updated: 2026-08-31

90Energy Cost
12,690XP Reward
90,000Enemy Base HP
6,000Stage Length
7Max Enemies
5.1Difficulty
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Cats that counter Mutation Lv.4

Cats whose attacks target Metal and Zombie, best DPS first — the traits this stage’s enemies actually carry:

Lovestruck Lesser DemonNezuko KamadoDaybreaker IzanagiMighty Rekon KorpsBalrogZangief

Stage rewards

100% — Cat Ticket ×1 · first clear

Enemy spawns (5)

EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotes
Metal Hippoe200%20s60s100%—
Znache30%∞6.7s10s~13.3s100%—
Zigge30%410s33.3s~36.7s100%—
Zir Zeal30%220s40s~43.3s100%—
Ms. Sign100%∞900s900s100%—
All Resident Undead stages