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

Overathousandyearsago,theByzantineEmpire(RomansbutCatholic)unifiedtheworldthroughacampaignknownastheSANCTIFICATION.ThisconquestwasmadepossiblebythePrimeTwelve.ImmortalwarriorsblessedwithCRESTS;Divinemarksthatgrantedthemgodlikepowers.ThePrimeTwelve'struepurpose,however,wastosealtheSevenDIAVOLO.Thesealingwassuccessful,butitcameatacost.DimensionaltearscalledRiftsbeganopeningacrosstheworld,unleashingVARIANTS;monstersthatdefiednaturallaw.Tocombatthisthreat,thePrimeTwelvefoundedMajorHousesandspreadCreststhroughouthumanity.Today,thosebornwithCrestscalledTOPPLERSformtherulingclassofsociety,whiletheCrestless,theACHUSOIaretreatedassecond-classcitizens.MarcusChenwasAchusoi.Hesurvivedbytakingwhateverworkhecouldfindintheempire'smargins,invisibletoaworldbuiltforthepowerful.Hislifeendedwhenonejobwentsideways,murderedbyHueyCross—theyoungestsonofHouseCross.OneofthePrimeTwelvelineages.Ironically,HueyhimselfwasCrestless,andanembarrassmenttohisbloodline.MarcuswakesupinHuey'sbodywithfragmentedmemoriesandaterriblerealization:HueyDIDhaveaCrest.JustnotonethatcamefromGod.Nowinhabitinghiskiller'sbody,MarcusmustnavigateVIRELIAINSTITUTE,auniversityforgiftedTopplers,whileinvestigatingwhathappenedeightmonthsagoatSt.HelenaHospital.....theincidentthatputhiminthisbody.Bynight,hebecomestheBlueReaper,avigilantehuntingdownsecretstheempireburied.Butashedigsdeeper,Marcusdiscoversahorrifyingtruth:theSevenDiavolowerenevertrulysealed.TheirHeraldswalkamonghumanityandheisinfactoneofthem.ArmedwithakingdomofApostles,maids,servants,footsoldiersandhisveryownpalaceREQUEIMwithinthedimensionofdeath-LIMBO.Marcuscomestoaccepthisnewfate“IAMTHEBLUEREAPER,ANDIHERALDDEATH.”---