Killer was a rabbit in Calling on Dragons who had a series of misadventures with spells leading to him becoming an oversized blue insubstantial floating donkey with wings. Later, Morwen and Telemain transfer all the spells except insubstantiability (having removed it from Killer) to Arona Michealear Grinogion Vamist, because they couldn't remove them. Killer then returns to his clover patch.