Presto

Presto a very small wizard who casts great big spells. During the time of Ultima IV he can be found in Herbs and Spice in Skara Brae.

He told the Stranger that he can cast the spells of Jinx, Kill, and View. And preceded to tell the Stranger to ask about nightshade, the thing the three spells have in common, at the Axe 'n Ale in Vesper.