The Tomb of the Nine Gods is a dungeon that eats adventurers. It is the centerpiece of the module. Detailed in the Tomb of Annihilation PDF, this mega-dungeon is packed with traps designed by the lich Acererak. DMs need the digital layout to understand the verticality of the dungeon. It has waterfalls, rotating gears, and magnetic traps that span multiple floors. The PDF allows the DM to preview the rooms and prepare the complex puzzle mechanics. Without this guide, running the smooth operation of the dungeon’s deadly machinery is nearly impossible.