Monster Doughnut Shop. It was destroyed by the cannons of the CSS Birmingham, with several of its heads being kept as spoils of war in the Camp Half-Blood attic. In The Mark of Athena, Percy fights a Hydra when he, Jason, and Piper are on a mission to rescue Nico from Ephialtes and Otis. In The Lightning Thief film, the creature takes the form of five janitors (played by Tom Pickett, Keith Dallas, V.J. Delos-Reyes, Spencer Atkinson, and Tim Aas) in the Parthenon replica in Tennessee. The Hydra is ultimately defeated after being petrified with Medusa's head. Karpoi – Grain spirits who are the size of toddlers. While many of them are malevolent thanks to their service to Gaea, children of Demeter are apparently also capable of summoning karpoi. Peaches – A friendly Karpoi resembling a pudgy human toddler with green eyes and green hair. He is controlled by Meg McCaffrey. Keres – Spirits of famine and disease who feed on violent deaths. They reside in the Underworld and support the Titans but do not assist them in The Last Olympian. In The Demigod Files story "Percy Jackson and the Sword of Hades", some of them attacked Percy, Thalia, and Nico. One of them poisoned Percy, yet "Bob the Titan" managed to heal him. Katobleps – Cow monsters that appear in The House of Hades. Ketos – Chiron mentions this giant sea monster in The Titan's Curse. Khromandae - A race of monsters with shaggy blonde fur, gray eyes, sharp teeth, and speak in high-pitched shrieks. Dionysus once used them in his drunken invasion of India. In The Tyrant's Tomb, the Kromandae were used during the Battle of San Francisco Bay where they are taken out by Apollo and Meg. Lemures – A race of angry ghosts who are seen on multiple times in The House of Hades. Leucrotae - Creatures that had the body of a red-furred lion and the hooves and tail of a horse and can't be harmed by metal weapons. In The Demigod Diaries story "The Diary of Luke Castellan", Luke and Thalia were trapped in Halcyon Green's mansion and encountered by two Leucrotae that speak with a man's voice. The two of them discovered that the Leucrotae are linked to Halcyon's thoughts. When Thalia uses fire on the Leucrotae, Halcyon sacrifices his life by luring the Leucrotae away so that Luke and Thalia can escape.