Proto-Indo-European mythology also in the myths of the slaying of the nine-headed Lernaean Hydra by Heracles and the slaying of Python by Apollo. The story of Heracles's theft of the cattle of Geryon is probably also related. Although Heracles is not usually thought of as a storm deity in the conventional sense, he bears many attributes held by other Indo-European storm deities, including physical strength and a knack for violence and gluttony. The original Proto-Indo-European myth is also reflected in Germanic mythology. In Norse mythology, Thor, the god of thunder, slays the giant serpent Jörmungandr, which lived in the waters surrounding the
Monster Mythology be found by player characters, or become enamored with a mortal character. This short appendix gives references where a Dungeon Master may find 2nd edition "Advanced Dungeons & Dragons" details on the deities of specific game worlds, such as the Forgotten Realms, Greyhawk, Dragonlance, and Dark Sun. Monster Mythology Monster Mythology is a sourcebook for the second edition of the "Dungeons & Dragons" roleplaying game. Released by TSR in 1992 and written by Carl Sargent, with interior illustrations by Terry Dykstra, John and Laura Lakey, and Keith Parkinson, "Monster Mythology" was released as a companion volume for "Legends & Lore".