Calumny

Calumny is a druid living in Yew at the time of Ultima IV.

Description
Teacher to the young Flatbush, Calumny was a solemn alchemist who had developed the spell which would come to be known as  Rel Tym - a cantrip which enabled those who cast it to move faster relative to those around them. Should the questing Stranger inquire, Calumny would prove willing to explain the composition of reagents necessary for such magic.

Should the hero learn of Calumny's possession of rare mandrake roots from  Rob Fraiser of Paws, they could ask of the magician where he got his supply, and would be directed to the Fens of the Dead and the Bloody Plains.

Trivia

 * Calumny is one of many characters in Ultima IV who inform the player that any spell that calls for more than a single portion of a reagent in the  Book of mystic Wisdom actually requires but a single portion of that reagent in actual gameplay.
 * In Yoko Tanaka's manga re-telling of Ultima IV, Calumny serves a much more prominent role, acting as magical tutor to the young protagonist of the comic,  Deane. In the course of the story, Calumny does, in fact, assist the party in the gathering of mandrake roots, explaining in detail how to harvest them without killing the tiny humanoid plants which produce them.