AmuletOfManyMinions/Soulbound Arsenal

The Soulbound Arsenal is a post-Mechanical Boss Hardmode weapon that summons an autonomous sword and bow to fight for the player. The summoned weapons will both stick close to the player and take turns attacking. The bow fires two non-piercing arrows at a time, while the sword fires a single sword-shaped projectile that pierces up to two times. Like other squires, the summoned weapons are invincible and follow 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.