The adventure centers on , an ancient elder brain that ruled over a mind flayer colony in the deep Underdark. Following the "Rage of Demons" event, Cyrog died, but its story did not end there. Orcus , the Demon Prince of Undeath, reanimated the elder brain as an undead monstrosity, effectively turning the entire mind flayer hive into a legion for his undead army.
Utilizes stat blocks from the Monster Manual and Volo’s Guide to Monsters , often featuring mind flayers and intellect devourers.
The digital package is widely available on platforms like Dungeon Masters Guild and DriveThruRPG . Key features include: Approximately 4 to 6 hours of gameplay.
Introduces mechanics such as brain worms , which characters can use to mask their psionic signatures and bypass the elder brain's "Creature Sense". Gameplay Experience
Players are typically recruited by a patron to infiltrate the lair and destroy the undead brain before Orcus can unleash this new psionic-undead horde upon the world. PDF Contents and Technical Details