How Does The Beholder Use Its Eye Rays In D&D Combat?

I still get a little thrill when a beholder shows up at my table — it's the kind of monster that forces everyone to play clever instead of just swinging. Mechanically, the way a beholder uses its eye rays in 'Dungeons & Dragons' is delightfully terrifying: on its turn it can fire multiple different magical rays at targets it can see, usually picking three rays per round (in 5e the stat block has it shooting three rays at random, re-rolling duplicates). Each ray has its own effect — some charm, some paralyze, some disintegrate or petrify, and others inflict sleep, fear, or telekinetic control. The important bits to remember are range (long — often around 120 feet), line of sight (it has to see the target), and that most rays force some kind of saving throw or impose a condition rather than dealing simple damage. That variety is what makes a beholder feel like ten different problems at once.

Tactically, I run beholders like control towers. They’ll try to lock down your casters with their antimagic cone from the central eye (it projects a large antimagic cone, which can neutralize spells and magic items if used wisely) and then use the lateral eye rays to pick off anyone who gets bold. In play I often have them target the party’s biggest threat first: the healer gets petrified, the wizard is disintegrated if they’re alone in the open, or a telekinesis ray flings the rogue off a ledge. Because the rays are varied, the beholder becomes a threat who punishes clustering — if your whole party bunches up the monster can hit multiple people with different debilitating effects in one turn. I also love using the telekinetic and sleep rays not just to damage but to rearrange the battlefield, slamming a fighter into a cage or tossing an archer out of a window. If the fight is in the beholder’s lair, layer in lair actions and environmental hazards and suddenly it’s a chess match.

If you’re a DM or a player facing one, think in terms of lines of sight, interrupting the central eye, and smart spreading. For DMs: use the randomness of the rays to create moments of pure chaos but lean into thematic targeting to make the creature feel cunning. For players: deny it easy sightlines, force close quarters where some rays are less deadly, and prioritize disrupting that antimagic cone — it’s not always about raw damage, sometimes the best tactic is to remove its advantage. I still grin whenever someone finally blinds the central eye and the entire dynamic of the fight flips, which is why beholders remain one of my favorite theatrical assassins in 'Dungeons & Dragons'.

I tend to think of a beholder like a mobile hazard generator. When I play, the thing I tell new players is: expect three different nasty effects every round and spread out. The monster's lateral eyes each produce one of many unique rays (charm, paralysis, sleep, disintegration, telekinesis, petrification, fear, and so on), and on its turn it fires several of them at targets it can see — usually three in 5e — so one unlucky character can get overwhelmed quickly.

From a player perspective, practical tips I’ve learned at the table are to break line of sight, move unpredictably, and protect your spellcasters because the central eye can project an antimagic cone that ruins concentration and magic items. If you’re the DM, remember the random selection of rays is a great way to create cinematic chaos, but you can still have the beholder act intelligently: go for the biggest immediate threat (healers, arcane casters), use telekinesis to reposition foes, and make use of lair features if present. In short, don’t treat it like a damage sponge — treat it like a tactical boss that punishes shortcuts, and your encounters will be memorable.