Which Published Modules Feature A Major Beholder Villain?

I geek out hard when a beholder shows up in a published adventure — there’s just something about those floating, paranoid eye-stalks that makes a session instantly memorable. If you want a clear, canonical place to find a major beholder antagonist, start with 'Waterdeep: Dragon Heist'. Xanathar is practically the poster-child beholder for the Forgotten Realms in 5th edition: he’s a crime lord, an obsessive collector, and one of the factional villain options the book gives you. Running Xanathar can turn an urban campaign into a delicious stew of espionage, weird schemes, and the constant paranoia of being watched by an eye that’s smarter than half your party.

If you're more into dungeon-crawling, the spiritual and literal extension appears in 'Dungeon of the Mad Mage'. Undermountain is a sprawling megadungeon where beholders and beholder-cultists crop up in lore and encounters; Xanathar’s presence is threaded through the setting, too. Between these two books you get contrasting vibes: one’s a social-crime drama in the streets of Waterdeep, the other’s a claustrophobic, layered dungeon with beholder threats that feel properly dangerous.

Beyond those obvious picks, beholders turn up in a bunch of other published materials across editions: classic Undermountain/Waterdeep supplements and later adventure expansions often add beholder lairs or syndicates as major antagonists. Third-party or older-edition modules sometimes center on single-eye tyrants, and a few Planescape-era adventures used beholders as political, planar, or mad-scientist villains — they make great puppetmasters because they’re both monstrous and weirdly bureaucratic. If you’re running a game, think about how a beholder’s paranoia drives plots: secret rooms, rival factions, double-crossing minions, and literal eye-spies everywhere.

If you want a tighter shortlist to check first, look at 'Waterdeep: Dragon Heist' and 'Dungeon of the Mad Mage', then branch into Undermountain/Waterdeep supplements and older Undermountain adventures for more beholder-led stories. And if you ever want help reskinning Xanathar as an underground art collector or a paranoid scholastic genius, I’ve got ridiculous ideas that always make my table howl.

I’m the kind of player who’ll squeal when a beholder becomes the headliner of an adventure, and there are a few published places where that actually happens. The clearest examples in modern 5e are 'Waterdeep: Dragon Heist' — where Xanathar is explicitly framed as one of the major criminal villains — and 'Dungeon of the Mad Mage', which deals with Undermountain and features beholder presences and connections to Xanathar lore. Those two give you very different flavors: city intrigue vs. deep dungeon menace.

If you dig into older or edition-spanning Undermountain and Waterdeep supplements, you’ll find more beholder-centric content and lairs; designers have loved dropping eye-tyrants into urban plots and megadungeons across the years. For quick running tips: play up the beholder’s paranoia, use minions and traps that reflect its obsessions, and don’t be afraid to let it manipulate events from afar — a beholder puppetmaster always sticks with players longer than a straight slugfest.