D&D 5E Can Beholders fly in an Anti-Magic field?

[Oofta]

Has the beholder been raised from the dead, much like this thread? This was answered long ago in Sage Advice. Short answer? Antimagic zone has no effect, any more than a dragon's breath weapon.

Spoiler: Sage Advice

Determining whether a game feature is magical is straightforward. Ask yourself these questions about the feature:

• Is it a magic item?
• Is it a spell? Or does it let you create the effects of a spell that’s mentioned in its description?
• Is it a spell attack?
• Is it fueled by the use of spell slots?
• Does its description say it’s magical?

 

[J.Quondam]

I've been inspired to run a monocled, mustachioed, hydrogen-filled beholder BBEG named "Dr. Hindenberg."

 

[Reynard]

I've been inspired to run a monocled, mustachioed, hydrogen-filled beholder BBEG named "Dr. Hindenberg."

Vulnerability: fire

 

[Bill Zebub]

I think beholders are filled with helium, which is why I always have them speak in hilariously high-pitched voices.

There’s a sub variant that uses hydrogen. Very dangerous.

Edit: oops, too slow.

 

[abirdcall]

Dragons wouldn't be able to fly in this scenario.

It would also likely kill a creature like a bulette outright as it gets crushed by the weight of its own chitinous shell.

Almost everything is magic of some sort.