This is the concept of the First Heretic (name work in progress) , a character playing a central role in a comic I started, somewhat, I'm lazy. But some of the story can be read in a less refined state on amino in a stylised way that felt too bad to upload it everywhere else. Sorry folks. (also I don't know what Keywords to use, with isn't that bad if yiu ask me)

Short version: after cannibalizing a of a God protected Otter tribe, he got cursed to forever roam the world in this cursed form.

Long version: The character sketch here is a Moose chieftain of a otter tribe. During a very hard winter, he had to make the decision to attack a neighboring tribe that was rumored to have a sauce of food, provided by one of the 3 gods. In the night they wanted to raid them in silence, but a child saw0 them, calling for help, and a fight started. The tibe of Moosen was stronger then the surprised and generally weaker otters, ending in a overwhelming victory. However, after the chieftain reached the hidden stockpile, that was magical regenerating itself, the God who gave it to them, turned it to dirt directly in from of them. In anger he ordered to kill the surviving people an eat them. The God, more than just being insulted, came down to them, and freed the survivors before any more of them could be killed. The members of the tribe run for their life's, but the chieftain remained, already having eaten of the flesh of the dead. But before the God could kill him, the other 2 intervened. A fight between the 3 started, killing 2 of them and making one go insane. The God who started it all, died and with his last hate-filled breath curesd the chieftain to forever roam the world in undeath and hunger.