Underground Labyrinth · Stage 99Underground B99F地底99層Data updated: 2026-07-24500Energy Cost2,820XP Reward600,000Enemy Base HP4,600Stage Length30Max Enemies9.4Difficulty Build a lineup for this stage Test your team vs this stageStage rewards100% — Catseye [Dark] ×1Enemy spawns (8)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesHeavenly Hippoe300%216.7s20s~26.7s100%—Maawth1200%136.7s—100%—Gabriel300%210s1s~2s99%—Heavenly Hippoe300%316.7s36.7s99%—Gabriel300%∞-10s30s~36.7s99%—LeMurr1200%120s—99%—Ursamajor1400%1-20s—99%—Cli-One750%1166.7s—99%BossAll Underground Labyrinth: The Grand Deep stages