>>5454650I'll try and give you the quick rundown on everybody's favorite corn-flake connoisseur.
In Warhammer 40,000, one of the main factions is Chaos, which is comprised of 4 distinct domains with their own "God".
Khorne's domain can be summarized as "Conflict". War, hatred, rage, wrath, blood, martial honor, strength and murder all fall under his purview.
His power is derived from basically any killing that occurs in the setting, so he doesn't really care about what his worshippers do so long as the blood keeps flowing.
To put that into perspective, if he were around in this setting, Karn would probably be receiving visions of Khorne in his sleep trying to corrupt him and turn him into a demonic savage.