Hellhound



A hellhound is a dog from the Fields of Punishment and a servant of Hades. Hellhounds are feared by half-bloods, though there are some exceptions, like Mrs. O'Leary.

Hellhounds are very large and can shadow travel.

Appearance
Hellhounds are usually described as being large, black mastiffs with glowing red eyes. They are about the size of a small bear, but can be larger. (e.g. Mrs. O'Leary)

Powers

 * Can shadow travel220px-Hel_(1889)_by_Johanne.jpg
 * Fast

The Lightning Thief
Just after Percy's first capture the flag game, he had been attacked and almost killed by a hellhound, the hellhound was killed by arrows from the Apollo's cabin. Later it was revealed that it was Luke Castellan who had summoned it, since no monster (unless given permission) can enter within the camp's borders.

The Battle of the Labyrinth
The main hellhound that appeared was Mrs. O'Leary, who is unsually, a friendly hellhound. She was probably trained by Quintus (Daedalus), because she is very loyal to him, and was very sad when he died. Her bark is said to be "slightly louder than an artillery gun." Quintus claimed that Mrs. O'Leary met him after "many close calls with death and quite a few giant chew toys".

The Last Olympian
Again Mrs. O'Leary appeared in this book. During the final battle, hellhounds were a part of Kronos's army.

Magic Items

 * Stygian Ice whistle (it is unsure if it calls any hellhound, but when Percy blew it, only Mrs. O'Leary came. This might have been due Kronos preventing them from answering the call)