Zaffai, Thunder Conductor is a mythic Legendary Creature — Human Shaman card from Magic Online Promos (PRM), collector number 90280.
Magecraft — Whenever you cast or copy an instant or sorcery spell, scry 1. If that spell's mana value is 5 or greater, create a 4/4 blue and red Elemental creature token. If that spell's mana value is 10 or greater, Zaffai deals 10 damage to an opponent chosen at random.