Nostrildamus was a "historical" figure in the Duckburg universe, based on worldplay on the actual "Nostradamus" and the word "nostril".
Nostrildamus was a 16th century astrologer who could see the future. According to him, his mystic medallion could get anyone his powers. Scrooge was interested in his medallion for financial purposes, but he ended up returning it to his tomb shortly after recovering it, because as he realized, it brought bad luck.