Special Stages · Stage 3Aku Studies 401: Field Research悪魔研究Ⅳ発見Data updated: 2026-07-24100Energy Cost8,930XP Reward880,000Enemy Base HP4,600Stage Length12Max Enemies9.5Difficulty Build a lineup for this stage Test your team vs this stageStage rewards100% — Cat Jobs ×3 · first clearEnemy spawns (11)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesSinner Snache500%∞3.3s13.3s~20s100%—Doge Dark1000%26.7s20s~26.7s100%—Brollow150%323.3s20s~23.3s100%—Croco4000%∞33.3s10s~16.7s100%—Sinner Snache500%100.1s13.3s~20s99%—Brollow150%80.1s23.3s~26.7s99%—Brollow150%50.1s10s~16.7s99%—Doge Dark1000%80.1s16.7s~23.3s99%—Tackey200%20.1s30s~36.7s99%—Le'Solar2500%10.1s—99%BossMs. Sign100%∞900s900s100%—All Empress' Report 4 stages