Vistani: Mighty wizard came to this land >1yr ago, remember like yesterday. Very charismatic man, thought he could rally the people of barovia against strahd. Took them to the castle, the army fled in terror upon seeing strahd. Wizard and vampire casted spells, magic flew overhead the precipice. Thunder shook and rocks crumbled on the wizard. Lightning from the heavens struck the wizard and again he stood his ground. But when Strahd jumped on him and threw him 1000ft he hella died. River took body away and was never found.
Stanamir?: The wizard in the story was cast in the Ibils River
Ismark the Lesser: Heard of a Mad Wizard roaming the foothills of Mount Hilltock.