Collaboration Stages · Stage 2On Holy Wings聖翼と呼ばれた少女1★ 100%2★ 150%3★ 200%4★ 300%60Energy Cost8,460XP Reward30,000Enemy Base HP3,800Stage Length6Max Enemies3.1Difficulty Test your team vs this stageEnemy spawns (8)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesOrthos (Enemy)100%116.7s—100%—Celesse (Enemy)100%∞33.3s10s~20s100%—Fuu (Enemy)100%150s—100%—Orthos (Enemy)100%160s—100%—Celesse (Enemy)100%566.7s3.3s~10s100%—Serum (Enemy)100%30.1s20s99%—Michelia (Enemy)100%10.1s—99%BossMs. Sign100%∞900s900s100%—All Merc Storia: Mystery stages