Since the lioden battle system is turn based, I thought this could be a possibility.

Very rare explore events that give you the opportunity to fight 'boss' NPCs based on your karma. These would be very difficult to beat and you would get special items or sizable amounts of SB for beating them. They would also each have unique battle AI and would actually have to be beaten with a strategy rather than just grabbing and pounding them until they die.

High good karma could encounter 'evil' 'bosses' like a cannibal lion, or a tsavo lion with ravens
High evil karma could encounter 'good' 'bosses' like a pair of shaman lions, or a leucistic or white lion

I might sketch some concepts later but for now tell me what you think about this idea, I think it could make fighting explore npcs a bit more exciting