Enginator

The Enginator is a craftable Hardmode boomerang which has both throwing and melee versions. Unlike other early game boomerangs, it is capable of throwing an unlimited amount of boomerangs at once, which all return to the player after traveling a short distance. The projectiles will inflict the Steamy debuff on enemies it hits.

The best modifier for the melee variant is Godly, and the best modifier for the throwing variant is Unreal.