Real Name: [Intelligible noise]
Alias: Rykken the Devourer
Age: Quite young for his species, but older than Cavemen.
Size: Variable (Sizeshifter, from Atom size to Galactic Cluster size)
Species: Extradimensional Demon
Occupation: Eating things and silly interactions with mortals
Alignment: Chaotic Neutral, often Evil to mortals
Strengths: Regenerative limbs (Except head), able to shift himself or parts of himself between dimensions, able to sizeshift and to change his bodyshape to either slim buff or fat, and able to eat anything, including rocks and stars. Can also display some attacking abilities, but he tends to not use them.
Weaknesses: If his head is cut off, it ends his life. If he gets big enhough, he loses the ability to dimension shift. He can suffer injuries which take time to heal, if he is badly injured he will feel immense pain and is vulnerable for a final strike. Rykken can become hungry, which limits his attacking abilities.
Personality: Cold and Merciless, toys with mortals only if he gets enjoyment out of it. Would rather eat them than become friends with them, however friendship isn't impossible, specially when good exquisit food is involved.

"Rykken is part of an unknown extradimensional species. They are known for their destructive capabilities and their contempt for mortals. They venture into the multiverse looking for food and fun. Rykken winded up on this reality. Nobody knows who his parents are, or how his society actually works despite the fact it's an anarchy, but Rykken has already marked his presence early on eating what he can. Cooked meals, people, buildings, mountains, planets and even galaxies. This is due to the fact he can sizeshift.

Rykken can in theory go from the size of a mere atom to the size of a galactic cluster, and he sizeshifts often, commonly sitting at mortal size, since more interactions can be had at this size. Rykken doesn't like mortals and how they call him a god, because they usually disturb him during his leisure times in an act of pure dogma. He has eaten the very worlds they resided on once they got too annoying. Truth is, Rykken is Rykken. He only cares about two things, Fun and food. He loves food. He is willing to shrink so the quantity of food can increase. He is obsessed with food, which is why he only terminates worlds once he finds them boring.

He's also capable of minor shapeshifting, changing the size of his muscles or the quantity of fatness. He also has some powers, but he finds them boring to use and only does so when under threat. While his limbs can regenerate, his head is his weak spot. If it is cut, Rykken dies. Many have tried at his head, but none have survived thus far. People often wonder what is up with this demon, but truth is, he's a free spirit, and nothing will keep him from his next meal."

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So this is my reference for the Devourer. Refining this to be easily perceptible was my biggest goal, and I think I did the job. I hope you guys like him as much as I do. :3