Special Stages · Stage 4Aku Studies 401: Inquiry悪魔研究Ⅳ考察Data updated: 2026-07-24100Energy Cost8,930XP Reward900,000Enemy Base HP4,600Stage Length10Max Enemies9.5Difficulty Build a lineup for this stage Test your team vs this stageStage rewards100% — Aku Catfruit Seed ×1 · first clearEnemy spawns (12)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesGabriel400%∞6.7s16.7s~23.3s100%—Miz Devil300%310s13.3s~16.7s100%—Celeboodle800%123.3s—100%—Gabriel400%236.7s13.3s~16.7s100%—Aku Gory250%146.7s—100%—H. Nah300%10.1s—99%—Celeboodle800%40.1s26.7s~30s99%—Aku Gory250%30.1s53.3s~56.7s99%—Miz Devil300%120.1s10s~13.3s99%—Medu-san100%10.1s—99%—Cala Maria100%10.1s—99%BossMs. Sign100%∞900s900s100%—All Empress' Report 4 stages