He can freely change between a material and a spiritual body.
Demon SlimeDemonic Viscous Spirit Body : As a Demon Slime all his bodily attributes are greatly enhanced.
An inferior version of Extra Skill Ultraspeed Regeneration.
Self-Regeneration: Allows the user to regenerate from injuries which include regenerating lost limbs.
Absorb and Dissolve: Slime-species intrinsic Skills that are inferior versions of Unique Skills Predator and Glutton.
These are later fused into Unique Skill Predator to create Extra Skill Ultraspeed Regeneration.
Intrinsic Skills: As a Slime, Rimuru has the species-specific Skills of Absorb, Dissolve, and Self-Regeneration.
SlimeViscous Organism : As a Slime, Rimuru is a monster that doesn't need to breathe, sleep or eat, as he can survive only on the magicules in the atmosphere.
Later becomes a God that rules over Time and space His subordinates are numerous Twelve of them are Awakened Demon Lords, who are equal to or more powerful than some of the members of the Octagram. He acquired a vast amount of power and becomes the most powerful existence in the universe. Rimuru eventually becomes one of the Demon Lords, and eventually, a Great Demon Lord. Rimuru is the founder and King of Monster Country Tempest in the Jura Forest. Reincarnated as a slime in another world, he becomes a friend of Veldora Tempest, one of the Four True Dragons, and slowly accumulated power through his acquisition of Skills and subordinates.
Satoru Mikami, he is a 37-year-old human virgin who died protecting a colleague.
Naofumi Iwatani ( The Rising of the Shield Hero).Anos Voldigoad ( The Misfit of Demon King Academy).