Who here remembers "revenge sims" from Perfect Dark on the Nintendo 64? What if there was a monster that, when killed, reincarnated and could hunt down the person who killed it? Perhaps it is a large monster that normally requires a group of people to take it down and it is capable of dealing considerable damage to terrain and structures. Perhaps something that looks like this (pictured is a Bulette from D&D):
Maybe it was hunted because it can be butchered for rare and important ingredients for making armor, weapons, or in alchemical processes. However, its ferocity in combat and reputation for wanton destruction makes anyone who has been branded by it a potential liability for any settlement. Some groups might be able to use a branded individual as bait to lure it into a trap where it can be more easily defeated, its carcass harvested for expensive components for trade.
I didn't know if this would make for a good design experience monster or something that would be cool for the devs to include in the game?