Underground Labyrinth · Stage 66Underground B66F地底66層Data updated: 2026-07-2450Energy Cost2,820XP Reward800,000Enemy Base HP5,400Stage Length10Max Enemies9.4Difficulty Build a lineup for this stage Test your team vs this stageStage rewards50% — Catseye [Super Rare] ×2 · Treasure RadarEnemy spawns (8)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesBrollow100%316.7s23.3s~26.7s100%—Brollow100%230s16.7s~20s100%—Brollow100%256.7s3.3s~6.7s100%—Cyberhorn800%10.1s—99%—Brollow100%1-13.3s—99%—Brollow100%2-33.3s2s~4s99%—Brollow100%2-66.7s2s~4s99%—Corporal Weyland1100%10.1s—99%BossAll Underground Labyrinth: The Grand Deep stages