Look at me!! I'm the reaper now: Reincarnated as the Herald of Death

Over a thousand years ago, the Byzantine Empire (Romans but Catholic) unified the world through a campaign known as the SANCTIFICATION.This conquest was made possible by the Prime Twelve. Immortal warriors blessed with CRESTS;Divine marks that granted them godlike powers.The Prime Twelve's true purpose, however, was to seal the Seven DIAVOLO.The sealing was successful, but it came at a cost.Dimensional tears called Rifts began opening across the world, unleashing VARIANTS; monsters that defied natural law.To combat this threat, the Prime Twelve founded Major Houses and spread Crests throughout humanity.Today, those born with Crests called TOPPLERS form the ruling class of society, while the Crestless, the ACHUSOI are treated as second-class citizens.Marcus Chen was Achusoi. He survived by taking whatever work he could find in the empire's margins, invisible to a world built for the powerful.His life ended when one job went sideways, murdered by Huey Crossthe youngest son of House Cross. One of the Prime Twelve lineages.Ironically, Huey himself was Crestless, and an embarrassment to his bloodline.Marcus wakes up in Huey's body with fragmented memories and a terrible realization:Huey DID have a Crest. Just not one that came from God.Now inhabiting his killer's body, Marcus must navigate VIRELIA INSTITUTE, a university for gifted Topplers, while investigating what happened eight months ago at St. Helena Hospital.....the incident that put him in this body.By night, he becomes the Blue Reaper, a vigilante hunting down secrets the empire buried.But as he digs deeper, Marcus discovers a horrifying truth: the Seven Diavolo were never truly sealed. Their Heralds walk among humanity and he is infact one of them.Armed with a kingdom of Apostles, maids, servants, foot soldiers and his very own palace REQUEIM within the dimension of death - LIMBO.Marcus comes to accept his new fate"I AM THE BLUE REAPER, AND I HERALD DEATH."---