Jessie Zane, Fangbringer is a mythic Legendary Creature — Human Assassin card from Alchemy: Outlaws of Thunder Junction (YOTJ), collector number 17.
Deathtouch When Jessie Zane enters and whenever you cast a Snake spell, conjure a card named Ambush Viper into the top six cards of your library at random. It perpetually gains "When this creature enters, draw a card."