Author of Encyclopedia of Animagical Kinship. Larx has included many descriptive passages of creatures, great and small, in his encyclopedia. Entries also contain various pieces of information such as spells and little known facts.

You are intriqued by a passage found in Encyclopedia of Animagical Kinship.

Hound, Hell: A mystical beast with soulless eyes and fur of flames. Summoned by burning immortal flesh with a splash of innocent blood. If safety is a concern, summon to a place very cold. The hellhound has never been tamed. - Festival of Heroes (GS-ADV1)

Larx Pokenpop has included a summoning spell in his book. If done correctly, you may be able to tame the famed hellhound.