Lava demons, which are based on water demons, but are always hostile. Instead of giving you a wish, they have a nonstandard ranged attack in which they wish for one of your items each time they see you. The wish attempts to pick the highest-value item out of your inventory.

The intended balance for the sight requirement is that you can sneak up on or blind them before they can wish for anything, but it’s not feasible to hide around a corner and wait for them to approach, because then they will get more wishes.