I... I had this whole massive thing about this and different options for our main character but somehow it managed to go back to the last page and lost it all so here goes again...and way shorter cause im pissed....
1. a goblin
2. dragon
3. slime
4. undead, turning after enough levels into other undead
5. spider like undead evolving into other forms of spider
6. a insect that evolves and grows much like the last 2, changing to the main characters needs and desires before becoming perhaps some form of animal..
Did you know this story is from Royal Road? Read the official version for free and support the author.
7. a worm creature that grows and devours everything in its tiny path but eventually evolves to gain limbs etc and become something more...much like the insect
8. demon much like the others in a weak, and basic form with others like him all around killing and eating each other. how will he survive ,evolve, and what will he do afterwards, will he try to corrupt,or conquer the world? or perhaps something else.(my personal favorite