Full Metal Rapier

• Name: Full Metal Rapier (フルメタルレイピア)
• Type: Passive
• Effect: Damage scales with the combined count of baby balls + enemies on the field.
• Added: April 27, 2026 (Shadow Update)

A Shadow Update dynamic-scaling damage passive. The more baby balls and enemies are on screen, the harder your shots hit.

Best on chaotic crowd waves and baby-ball-spawning comps where both halves of the formula compound.

Less useful in clean 1v1 boss phases where neither stat is high — pair with another scaling source for boss content.

• Sniper / Corpse Explosion — generate large baby-ball counts
• Sisyphus — 4× AoE engages more enemies
• Magnet — manage baby-ball trajectories
• Physicist — better baby-ball physics

• Stack baby-ball-generating effects
• Treat as your trash-wave damage core
• Pair with crit / % HP for boss matchups