Upon learning of the Fury's reason for the attack, Mr. Brunner gives Percy a pen, tells him it is a powerful weapon, and has Grover take Percy and his mother Sally to Camp Half-Blood, leaving behind Sally's husband Gabe Ugliano. However, the three are attacked by a minotaur that appears to kill Sally, who is unable to enter the camp. Grover tells Percy to use the pen, and Percy discovers that it is a sword, which he uses to fight the Minotaur, without initial success. Percy kills the Minotaur with its own horn, then faints from shock.