Collaboration Stages · Stage 8300 Yard Strikeひとふり300ヤード1★ 100%2★ 150%3★ 200%4★ 300%125Energy Cost17,625XP Reward400,000Enemy Base HP6,000Stage Length6Max Enemies5.2Difficulty Test your team vs this stageStage rewards10% — Healer · first clear · Treasure RadarEnemy spawns (8)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesAura (Enemy)100%153.3s—100%—Yoichi (Enemy)400%∞33.3s40s100%—Yoichi (Enemy)400%134.7s—100%—Serum (Enemy)300%∞46.7s53.3s100%—Serum (Enemy)300%147.3s—100%—Healer (Enemy)100%113.3s—100%—Wyvern (Enemy)100%193.3s—100%BossMs. Sign1200%∞900s900s100%—All Merc Storia: Showdown stages