You should never eat cheese before sleeping. This cheese looks, smells, and tastes like normal cheese, but can be identified by an effect that senses magic. It can be used as an ingredient in any recipe that requires cheese. When this cheese is consumed, for the next 24 hours, the eater will gain no benefit from rest and when falling asleep (including magically) they must succeed a DC 16 Wisdom check, or be haunted with nightmares and take 2d6 psychic damage.

Notes: I didn't know where to put it so..., Debuff, Utility, Consumable