Gensokyo/Ghost Princess Fan

The Ghost Princess Fan is a Hardmode magic weapon. It shoots three to four slow-moving butterflies which, upon hitting a non-boss enemy, have a 5% chance to instantly kill the target regardless of remaining health. Its alternate fire summons a massive swarm of these butterflies, but has a cooldown of 10 seconds.

The Ghost Princess Fan is available for purchase at the Curio Trader after unlocking Tier 6 items.

Trivia

 * The weapon is a reference to a spell-card used by the character Saigyouji Yuyuko.