There's an entire race of monsters/demond that have demonlords as your big boss types, and then a reigning dark lord.
Two demonlords are at odds because one ended up with a human soul corrupting him, and therefore wants to stop the other one's plans of bringing the world back to chaos. Said plans involve using me to do it, so one side wants to kill me and the other wants to protect me to later on kill everything else.