The Rabbit of Caerbannog is an immensley cute but bloodthirsty rabbit -like monster and a prominent antagonist in Monty Python and the Holy Grail. The Killer Rabbit of Caerbannog is a fictional character in the Monty Python film Monty Python and the Holy Grail. The scene in Holy Grail was written by Graham First appearance : Monty Python and the Holy. Killer Rabbit of Caerbannog (Monty Python Rabbit). Gefällt Mal. Dedicated to the most feared creature in all of Caerbannog. - King Arthur and his.