Champions of Ruin is a comprehensive guide to playing evil characters in the Forgotten Realms setting. Many aspects of play are covered: vengeance, ambition, evil vs. evil, corruption and moral failure, loyalty and betrayal. The book also discusses types of evil -- lawful, chaotic, and neutral -- as well as morally ambivalent characters such as anti-heroes and rogues. Elder evils of extreme power are discussed along with tools, feats, spells, evil places and planar touchstones, and guilds and organizations that evil characters can join. Two new races are also introduced.