AmuletOfManyMinions/Soulbound Sword

The Soulbound Sword is an early Hardmode weapon that summons an autonomous sword to fight for the player. The summoned sword squire will fly a maximum of 20 blocks away from the player to attack towards the cursor while its item is in use. Like other squires, the summoned sword is invincible and follows the player for an unlimited amount of time, unless the player dies, summons a replacement squire, or cancels the buff.

Its best modifier is Mythical for the widest array of set bonuses, or Ruthless for the highest damage output.