The explanation of this bit of cartoony silliness is on the DA page and I don’t feel like replicating it here. Blood for Khorne! KILL IT ALL!
Virtually nobody ever could be as happy about the prospect of omnicide as Lord Nukemeister. I was picturing this as a sort of logo or poster that aspiring young khornate genocidal maniacs might put on their folders at school, emulating their mindlessly violent hero.