Minotaur

In th first book, the Lightning Thief, Percy Jackson when running to Camp Half- Blood comes along a Minotaur. The Minotaur almost kills Percy's mother but is held hostage by Hades and later

released after Hade's Helm is returned. Percy got on to the Minotaurs head and pulls of one of the Minotaur's horns and kills it by stabbing it in the side. Percy kept the horn as a prize.