them. Some of them later end up in the troglodyte caves. Telekhine – Dog-faced sea demons that reforged Kronos's blade in The Battle of the Labyrinth. In The Mark of Athena, some Telekhines are seen in a water tank at the Georgia Aquarium. Trojan Sea Monster – A sea monster that rampaged the coasts of Troy until it was slain by Heracles. It is also known as the Keto Trois. In The Lost Hero, Jason Grace claims to have slain this monster while fighting Porphyrion of the Gigantes. Typhon – A very powerful monster. He sired many monsters by Echidna. He lives and sleeps inside Mount St. Helens. In The Battle of the Labyrinth, Percy causes Mount St. Helens to erupt while trying to escape Telekhines and he inadvertently awakens Typhon in the process. In The Last Olympian, Typhon awakes and moves across America destroying everything in his path. As he is concealed in mist, Typhoon's appearance is not described and appears as a freak storm. The gods of Olympus try to stop him, but he is too powerful. In the end, Poseidon and his army help to defeat him and Poseidon opened up a tunnel that sends Typhon directly into Tartarus. Once Typhon was defeated, a wave of anemoi thuellai were born. Unicorn – A horse with one horn. A herd of unicorns are used as steeds for the campers of Camp Jupiter. A red-tinted Lares with the head of a wolf guards them. Buster - A unicorn that lives in Camp Jupiter. In The Tyrant's Tomb, Meg and Pranjai use his horn shavings to tend to the scratch on Apollo's stomach. He later joins the other unicorns in fighting the invading zombies during the second wave of Caligula's Assault on Camp Jupiter. Horatio - A unicorn that lives in Camp Jupiter. In The Tyrant's Tomb, Horatio is among the unicorns that fight Tarquin's army during the Battle of San Francisco Bay. Muffin - A unicorn that lives in Camp Jupiter. In The Tyrant's Tomb, Muffin is among the unicorns that fight Tarquin's army during the Battle of San Francisco Bay. Shirley - A unicorn that lives in Camp Jupiter. In The Tyrant's Tomb, Shirley is among the unicorns that fight Tarquin's army during the Battle of San Francisco Bay. Whagadoodle - A unicorn that lives in Camp Jupiter. In The Tyrant's Tomb, Whagadoodle is among the unicorns that