Collaboration Stages · Stage 7Threads of Love愛で紡ぐキズナ1★ 100%2★ 150%3★ 200%4★ 300%Data updated: 2026-07-24115Energy Cost16,215XP Reward250,000Enemy Base HP5,600Stage Length5Max Enemies5.2Difficulty Build a lineup for this stage Test your team vs this stageStage rewards7% — Healer · first clear · Treasure RadarEnemy spawns (9)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesFuu (Enemy)100%30s10s~20s100%—Celesse (Enemy)400%∞6.7s23.3s~33.3s100%—Rei (Enemy)200%340s3.3s~6.7s100%—Norn (Enemy)400%30s0.7s~3.3s100%—Serum (Enemy)300%366.7s1.3s~3.3s100%—Serum (Enemy)300%∞86.7s33.3s~46.7s100%—Wyvern (Enemy)100%180s—100%BossRei (Enemy)200%∞80s46.7s~53.3s100%—Ms. Sign1200%∞900s900s100%—All Merc Storia: Showdown stages