Somnium

Miscellaneous Item, Legendary (requires attunement)
A rough stone of dark gray. Dreamslate is a piece of the moon Iquatana that has fallen to Mirendakor. When forged into a slate four inches across and half an inch deep placed beneath the head of a sleeping creature, they are guarded against any magical or divine intrusions on their sleep. Additionally, the creature gains the benefits of a long rest whenever they take a short rest.