Underground Labyrinth · Stage 81Underground B81F地底81層Data updated: 2026-07-2450Energy Cost2,820XP Reward800,000Enemy Base HP5,300Stage Length20Max Enemies9.4Difficulty Build a lineup for this stage Test your team vs this stageStage rewards50% — XP ×500,000 · Treasure RadarEnemy spawns (9)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesCroconator100%103.3s3.3s~10s100%—Mr. Angel150%413.3s13.3s~20s100%—Great Angel Chibinel100%130s—100%—Croconator100%∞60s6.7s~10s99%—Mr. Angel150%326.7s1s~2s99%—Mr. Angel150%3-26.7s1s~2s99%—Mr. Angel150%3-53.3s1s~2s99%—Great Angel Chibinel100%153.3s—99%—Super Metal Hippoe200%113.3s—99%BossAll Underground Labyrinth: The Grand Deep stages