Mini-Hakkero

The Mini-Hakkero is a Hardmode unique magic weapon. When used, it shoots 5 knifes in a spreaded-style, and will also randomise the secondary projectile, which can either be a homing star or a poisonous heart. Currently it's unobtainable.

It's a reference to Touhou, more specifically Marisa and her Mini-Hakkero. The weapon's tooltip is also a reference to Marisa's motto, "It ain't magic if it ain't flashy. Danmaku's all about firepower.".