It's the Killer Rabbit of Caerbannog.
Don't let his 1 point of Morale fool you. I haven't come across a Holy Handgrenade of Arthedain yet, so until that time I'm giving him a wide berth.
Bravo Turbine for this fun bit of Pythonesque tribute.
Props to my Council of Eriador kinmate, Noodly, for bumping this Cracked Egg up on my list!