Dreamwalk. The elemental can teleport from the Dream World to any creature on the Dream World or Material Plane that is sleeping. The elemental also has advantage on stealth checks while in the Dream World.
Dream Strength. If the elemental is ever required to make a melee attack, it uses its wisdom score instead.
Multiattack. The elemental makes two slam attacks.
Slam. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 14 (2d8 + 5) psychic damage.
Dream Eat. Melee Weapon Attack: +7 to hit, reach 5 feet., one sleeping creature. Hit: The target gains 1 level of exhaustion, and the cobalt regains hit points equal to a quarter of the target's current hit points. The target does not benefit from a long rest if it was taking one.
Description
A cobalt is an elemental born from dreams. It looks like an incorporeal humanoid consisting of shadows and blue light, even though it's solid. Cobalts inhabit the Dream World, although they sometimes travel to the Material Plane to feast on dreams, which they must consume at least once a week to stay alive.
If a cobalt is killed on the material plane or dream world, it reforms after 7 days on the astral plane, where it then must find its way home to the dream world. The only way to truly kill a cobalt is to kill it on the astral plane.