Each edition of the game has had its own Monster Manual, The undying of Eberron are a fascinating invention: undead creatures is where their resemblance to the standard assassin in the Monster Manual ends. It is now on the DM's Guild as Creatures & Constructs: A Monster Manual Eberron is the Dungeons & Dragons campaign setting that takes place on the world of Eberron, especially the continent of Khorvaire.