Manannan

Manannan is the chief antagonist of Kings Quest III: To Heir is Human, a wicked wizard who held the youth known as Gwydion prisoner for many years and treated him as a slave he is a cold-hearted figure with little regard for anyone save himself. Manannan is also shown as being cruel, turning Gwydion into a snail as punishment when he fails to do a chore - yet restoring him to normal afterwards. It is revealed later in the game that Manannan also kidnapped Gwydion, who was in reality a prince and heir to the throne, after many adventures Gwydion returns and ends Manannan's evil reign via transforming the once proud wizard into a cat.