Defender's Gauntlet

This heavy leather gauntlet features reinforced knuckles and a magnetic clasp on the back of the hand. You can attach a one-handed melee weapon to the gauntlet, which then animates and hovers near you, acting semi-independently. Once per round, the hovering weapon can either make an attack of opportunity against a creature that provokes one, or attempt a parry (using your reaction to add your proficiency bonus to AC against one attack you can see). The weapon uses your attack and damage modifiers.