Frost Piercer

The Frost Piercer is a summon weapon dropped by the Queen Spider Boss with a 25% chance. Using it summons up to 8 flying frost crystals that orbit until an enemy gets close, at which point they launch and home in on the target. After a crystal hits an enemy, it is consumed and must be recreated by using the item again.

Unlike many summon weapons, Frost Piercer does not use any summon slots. This makes it especially useful as a secondary source of damage, since it can be combined with another summon weapon to increase total summon output without reducing your normal summon capacity.

A few interaction rules are important when building around it:

• It does not stack with Reapers Call or Ruby Shields.
• It does stack with Slime Canister.
• Since the crystals must be respawned after they strike a target, the weapon works best when you can safely reuse it between waves or during longer fights.

Because the crystals automatically seek out enemies once something enters range, Frost Piercer is strongest in situations where enemies stay near the player long enough for the crystals to trigger. Its slotless nature makes it a flexible pick for summon-focused builds, especially when you want extra damage without changing your main summon setup.