Beholder

Regional Effects

Source: Monster Manual (2024)

The region containing a beholder’s lair is twisted by its presence, creating the following effects:

• Scopophobia. Creatures within 1 mile of the lair feel as if they’re being watched. Any creature (excluding the beholder and its allies) that finishes a Short Rest while within 1 mile of the lair must succeed on a DC 13 Wisdom saving throw or gain no benefit from that rest.
• Warping Terrain. Minor warps in reality occur near the lair; any creature (excluding the beholder) within 1 mile of the lair that makes a D20 Test and rolls a 1 has the Prone condition.

If the beholder dies or moves its lair elsewhere, these effects end immediately.