an undead farmer  

It's for the quest Farmer Joen's locked up locket:
https://everquest.allakhazam.com/db/quest.html?quest=3916

You need this mob and he shows up in the cart behind the farmhouse, but spawns rarely... some people are lucky and bump into him but most have to run around and wait. We got him at night, but later on he didn't spawn, not even after taking out all the other mobs behind the farm.

I don't know what the pattern is or formula for him to spawn. Only saw him once after a few days in the area killing skellies and Nokk skellies (good leveling area)...