Arch-hag

Regional Effects

Source: Monster Manual (2024)

The region containing an arch-hag’s lair is altered by its presence, creating the following effects:

• Lapsus Linguae. Creatures (excluding the hag and its allies) within 1 mile of the lair subtract 1d10 from any ability check they make when they take the Influence action.
• Meddlesome Magic. Whenever a creature other than the hag or its allies finishes a Long Rest while within 1 mile of the lair, the next time that creature casts a spell using a spell slot, it also casts Confusion centered on itself. The spell uses the creature’s spellcasting ability and doesn’t require Concentration.

If the arch-hag is destroyed or moves its lair elsewhere, these effects end immediately.