Slime

Amorphous, shifting and really quite drippy, most scholars assumed Slimes were elementals until it was discovered that they were not comprised of any magical energy and were, in fact, an entirely mundane creature. Slimes have one of the most unique physiologies of any creature within the mortal world. Where other multi-cellular beings have cells that carry out their own unique functions, every cell in a Slime's mass can take on any role it requires and alter itself on a whim. The cellular structure of a Slime could be called simplistic, but on a microscopic level it is immensely complex, each cell interacting and cooperating with every other in perfect unity. This could be the reason why the actual central consciousness of a Slime is so simplistic.