Sanguine Soothsayer is a rare Creature — Bat Cleric card from Alchemy: Bloomburrow (YBLB), collector number 11.
Flying, lifelink Whenever this creature attacks, conjure a card named Sanguine Bond into the top fifteen cards of your library at random. It perpetually gains "You may pay {0} rather than pay this spell's mana cost" and "When this permanent enters, draw a card."