
So our beholder is occupying squares (12,13,22,23) as a large creature. A cone's area of effect specifies its maximum length.Ī cone's point of origin is not included in the cone's area of effect, unless you decide otherwise. A cone's width at a given point along its length is equal to that point's distance from the point of origin. Which is always a good strategy for surviving an encounter with a beholder.īy a RAW reading, your (ex)DM appears to be correct.Ī cone extends in a direction you choose from its point of origin. So, while Forcecage is limited against a beholder it can effectively immobilise it which might be useful - especially if you want to run away.

It can't get out because the hole gets too small for it to fit through. Now, even though there is a hole in the cage in front of the beholder, the beholder can't actually get out because as it approaches the cage, the area of the cage suppressed gets smaller because that's how cones work.


I've shown this link to the Beholder's player but he says that the Forcecage description says "a forcecage resists dispel magic", but the Beholder's Antimagic Cone is not "Dispell Magic", so wherever the Beholder points with his Antimagic Cone, all Forcecages and Walls of Force WILL be supressed. Also that question was answered for DnD 3.5e. So it's not exactly the Beholder vs Forcecage spell. I've searched for an answer on this website, but the closest what I've found is this, saying that an already "existing" Forcecage probably will not be affected by the Antimagic Field.

One of the high-level NPC wizards, who was helping the party in this fight, decided to cast Forcecage on the scary Beholder.īut the guy playing the Beholder (ex DM) said that this tactic wouldn't work with Xanathar, because: I as the DM have decided to make this encounter a bit more fun by letting some of the spectators to play as NPCs (including the Beholder itself) We're running Dragon Heist and the party is facing the Xanathar himself in a battle.
