Cursed Hammer

The Cursed Hammer is a Hardmode enemy that spawns in the Underground Corruption. It hovers and spins before flying at the player, traveling through blocks. Any knockback stops its attack, forcing it to pause and spin up again. It can inflict the Cursed debuff.

Trivia

 * Most likely a tribute to Castlevania, where swords and hammers have the same attack pattern.