The multiverse of Dungeons and Dragons brims with peril, and many of the greatest dangers are monsters. A companion to the Monster Manual, this book collects monsters from many different planes of existence, each creature ready to imperil D&D heroes of different levels. The book also includes game statistics for nonplayer characters, who may assist or oppose the heroes, and an array of fantastical races for players to consider for their characters. The monsters and fantastical races in the following chapters are accompanied by the occasional comments of the mighty wizard Mordenkainen, one of the most learned mages of the D&D world of Greyhawk. The archmage Tasha, Mordenkainen's friendly rival, interjects as well. All together, the monsters, nonplayer characters, and fantastical races herein provide a host of new friends and foes to populate your D&D worlds.