Rooftop Storm from the upcoming Innistrad block is visually spoiled in this Magic the Gathering article.
This Innistrad Rare was recently spoiled:
Card Type: Enchantment
You may pay 0 rather than pay the mana cost for Zombie creature spells you cast.
Quote: “Let those idiot priests tremble! A new era in unlife begins here and now. Oglor, raise the lightning vane!”
– Stitcher Geralf
Casting Cost: 6 (5, Blue)
Illus. – John Stanko