Collaboration Stages · Stage 6Lost Memories失われた記憶1★ 100%2★ 150%3★ 200%4★ 300%105Energy Cost14,805XP Reward180,000Enemy Base HP3,700Stage Length6Max Enemies5.1Difficulty Test your team vs this stageStage rewards6% — Healer · first clear · Treasure RadarEnemy spawns (8)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesCelesse (Enemy)400%∞0s16.7s~30s100%—Nono (Enemy)400%∞3.3s16.7s~30s100%—Yoichi (Enemy)400%∞6.7s16.7s~30s100%—Serum (Enemy)400%20s1s~2s80%—Serum (Enemy)400%∞0s16.7s~23.3s80%—Norn (Enemy)400%∞0s10s~16.7s80%—Healer (Enemy)100%10s—80%BossMs. Sign800%∞900s900s100%—All Merc Storia: Showdown stages