Ancient Immortal's Reversal

Spencer Price, an ordinary man who has lived through misfortunes and hard labor has relinquished his faith in what life has to offer. He decided to end it once and for all but was caught up in a windfall of a fallen immortal and resurrected. Albeit back in time, things would never be the same and a series of butterfly effect would change everything for our protagonist. Would he have the power to defy a supreme existence? Would he, with a power bestowed, be able to change everything?