Transmigrated As A Baby Villain

Thetransmigratorwonderedwhyhetransmigratedintovillain'sbabyform,canheevensurvivethiscrappyworlduntilhereacheshis18thbirthdaysohecankilltheprotagonist?Andwhyarehisparentsyoungerthanhim?Jaydied.Hewokeupinthebodyofababy,andhethoughthewasrebornwiththememoryofhispastlife.Then,theSystemhappilytoldhimthathetransmigratedintoanunpublishednovelwhichhestolewhenhewasalive,andhe'sthemainvillaincalledKaontheBloodPrince,themostvicioussuperpowerhumantoevergracedtheEarth,yettheauthordidn'tdevelophimverywell.TheonlythingthatJayknowsaboutKaonishissuperpowerisusinghisopponent'sbloodtomakerain.ThesystemsaidhismissionistotakedowntheprotagonistKadethegoldenboy.That'seasyenough,theprotagonistisnothingcomparedtoKaonintermsofsheerpower,andKaonwonintheoriginalwork.IfJaycompleteshismission,hecanbereborninhisoriginalworld.There'sonetinylittleproblem:Kaonisababy,barelyoneyearold.Hisstats?Allzeros.Atleasthe'sstartingatlevel1.AccordingtotheSystem,he'sbeingtakencareofbytwopeople:anundeadfifteenyearoldvillainandathirteenyearoldhero-traitor-to-be.Noneofthemknowhowtoholdababyproperly,letaloneraiseoneinpoverty.Itseemslikeeverythingisouttokillthebabyvillain.Canhesurvivetoadulthood?AndwhyiseveryonenamedJayinhere?