So basically the Koa is your soul and it holds all of your power and strength and as it opens mire the more powerful you become but even super skilled that train for 60 years can only open a few cracks
At high noon for 1 min and 30 seconds when he obtains that godly power he is basically unbeatable even if he does face a god but past high noon his power starts to drain as it becomes night he is completely powerless even against a simple thug
((I guess if u wanna see it like that)) but for some reason kazkaan's koa was incomplete at birth and it opens up more and more as the day goes on and as the sun rises....at high noon it opens 100% for kazkaan and he basicly becomes a god