The Primordial Of Deaths Awakening

A Primordial of Death, one of the highest ranking gods in existence is killed by his enemies. But unknown to them, this is all part of a plan concocted by the royal family. They erase most of their sons memory and send him to a far off planet that has yet to achieve space travel. Armed with his knowledge from his time as a primordial and having been reborn alongside some of his warriors and advisors who fought and died with him, he sets about trying to regain his position. Starting with the kingdom he was born into! Now how will someone who has only ever used force to get what he wants, fare in the world of politics, assainations and flattery?