whenever you cast a spell from your hand, reveal the top x cards of your library, where x is that spell's mana value. you may cast a spell with mana value x or less from among cards revealed this way without paying its mana cost. put the rest on the bottom of your library in a random order.
Vulshok mana rituals echo the day when the red sun burst through Mirrodin's surface to take its place in the heavens.
