The Tale of the Void Emperor

This is not your usual isekai novel. it has my unique world background, unique power system and i am trying it make it a unique experience for every reader. :)Athan, a 16-year-old boy, lived until he was killed for a stupid reason. (stupid reason & more in the prologue:v)But it seems that fate had stored different things for him as after death as he transmigrated in the magical world inside a dead body of a boy with the same name and same facial features as him.He also found out that a mysterious black whirlpool seemed to be inside him.Was someone responsible for his transmigration? if so then who? and why? or was it pure coincidence that he got a new chance at life?