Thought of for many centuries to be an urban legend, Kreann'ot n'Horosh, a creature called “Moss Man” was in fact an ancient Eternian nature god and ally to King Grayskull. During the rise of Skeletor and the subsequent battles with the Snake Men and Horde invaders, Moss Man often joined forces with the Masters of the Universe helping to protect freedom for all forms of life.

Moss Man has the ability to change into any type of plant, thus being able to camouflage and hide from enemies. Moss Man also has the ability to dominate any type of plant or vegetation. It also features an enhanced agility and strength similar to an ape.