Underground Labyrinth · Stage 28Underground B28F地底28層Data updated: 2026-07-2430Energy Cost1,692XP Reward600,000Enemy Base HP3,000Stage Length9Max Enemies8.3Difficulty Build a lineup for this stage Test your team vs this stageStage rewards50% — Catseye [Uber Rare] ×1 · Treasure RadarEnemy spawns (4)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesDoge3000%∞3.3s10s~13.3s100%—Those Guys3000%∞3.3s6.7s~13.3s100%—H. Nah100%220s40s~43.3s100%—Otta-smack-u400%533.3s20s~23.3s100%—All Underground Labyrinth: The Grand Deep stages