I'm sorry to have to correct this, but the information given out was incorrect. The name of the boss is "Nosferabbit", and he does not drop any permanent mounts. However, he does drop eight of the 24-hour mounts. Unfortunately, no boss drops permanent mounts. I'm sure if one did, the boss would be constantly farmed. The special item that you speak of is the Frankenbunny, and is received from turning the quest back into Dworgyn. I hope this helped. Happy questing!
I trashed my Frankenbunny. Death only! This is necromancy month!
Your forget hatching. I have several scarecrows that were death only pets but after hatching I have ones that can be equipped on any wizard. Sometimes it pays to wait a bit before making such rash moves. After all a nice spooky spot in your house would have been much more fun.