Elder Evils provides DMs with 160 pages of truly wicked threats to challenge high-level heroes. Each "elder evil" described in this nightmarish tome comes with a detailed description, stat blocks for the elder evil and its minions, tips for how to incorporate the elder evil into any D&D campaign, adventure seeds, and maps of the elder evil's lair (complete with encounters and room descriptions). The book also provides guidelines to help DMs create their own unique elder evils as worthy campaign villains and endgame encounters.