Blade Staff

The Blade Staff is a Hardmode summon weapon that is dropped from Enchanted Swords. When summoned, a miniature Flying Knife spawns above your head and follows you around. When an enemy is nearby, it flies to the enemy and goes back and forth like a Stardust Dragon. It has relatively low damage, but ignores 25 enemy defense to make up for it.

Its best modifier is Mystic: unlike most summon weapons, Blade Staff has no knockback, thus it cannot get the Ruthless modifier.

Trivia

 * The Blade Staff has the lowest base damage out of all the minion summon weapons in the game, but the low damage is easily compensated by its ability to ignore enemy defense.
 * While the summons of the staff has a similar appearance of the Flying Knife, it is not a drop from Hallowed Mimics, but the Enchanted Sword.