Special Stages · Stage 4Mutation Lv.4突然変異Lv.4Data updated: 2026-07-2490Energy Cost12,690XP Reward90,000Enemy Base HP6,000Stage Length7Max Enemies5.1Difficulty Build a lineup for this stage Test your team vs this stageStage rewards100% — Cat Ticket ×1 · first clearEnemy spawns (5)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesMetal Hippoe200%20s60s100%—Znache30%∞6.7s10s~13.3s100%—Zigge30%410s33.3s~36.7s100%—Zir Zeal30%220s40s~43.3s100%—Ms. Sign100%∞900s900s100%—All Resident Undead stages