"MANKIND IS A FAILURE, FREE WILL IS A FLAW."
Upon your untimely demise, you will find yourself going neither heaven nor hell, as instead, your soul will promptly leave your fleshy prison, and with sheer unadulterated willpower, will manifest a physical form befitting of you.
But luckily for you, you don't need to be dead to yield results as a Prime Soul. You will find yourself to be more. More powerful, more skilled, more focused. All of you power's will be amped it to a notable degree. Your personality will be more forceful, as a by product of having so much willpower.
But when you are dead, when your soul has manifested a form, you will be much more powerful. As a baseline, you will be able to do dropkicks that creates shockwaves, move with short bursts of speed that ordinary people would mistake for teleportation. But that is just if you were an ordinary man, as your soul becomes more powerful, the stronger the body and mind was.
If you had the strength to go toe to toe with Alexandria, you will be able to beat Leviathan with moderate difficulty. If you could use telekinesis to lift a moderate sized house, you could now lift a skyscraper with little difficulty.