Power levels:

Basic, intermediate, high, ancient, heaven, ascended, god.

(Or just 'Tier 1-7')

Stages 1 - 6 in between

Basic level stage 1-3 being normal-strong human and god being able to destroy mars with a single attack

basic elements: fire, water, earth, wind

(wow!!! new thing :o !!!)

element evolutions is a thing, but i haven't fully decided all of them yet