Power Level's

The power level here works based on what I call KARMA for every 5 KARMA you can go up a level in every level you need to get soul coins of the same level 10 of them which you get by breaking soul bodies which does not kill the soul's but hurts them causing massive amounts of pain

for every level, there are 10 ranks so far the main character discovered in the first level you get 25 units of extra energy every grade in the 0 level which means your not quite a soul warrior but your making your way to soul warriorhood

So far we have no more information about how it works other then grades and levels