In "The Dark Knight Returns", Batman initially goes into action wearing the standard Batsuit, but he dons a suit of powered armour when facing Superman. Features of this suit include an ultrasonic gun- along with sonic dampeners to prevent Batman being damaged by the same weapon- and the ability to plug directly into Gotham's power grid by connecting the suit to a lamp in Crime Alley. When plugged into the power grid, the suit was powerful enough to do some damage to Superman in a fight, but this required Batman to confront Superman at night after he had been hit with various other weapons, such as missiles from the Batmobile and an arrow of synthetic kryptonite. Three years later ("The Dark Knight Strikes Again"), Batman has returned to his original suit with a completely black cape and cowl, the cape's edges being so sharp that he is able to use them to carve a 'Z' onto Lex Luthor's face. During his initial rematch with Superman, after the Man of Steel had been worn down by various other attacks, Batman beat Superman into submission with a large pair of Kryptonian gauntlets.