Visions of Phyrexia (Promo Pack) [The Brothers' War Promos]

Set: The Brothers' War Promos Type: Enchantment — Enchantment Rarity: Rare Cost: {2}{R}{R} At the beginning of your upkeep, exile the top card of your library. You may play that card this turn.At the beginning of your end step, if you didn't play a card from exile this turn, create a tapped Powerstone token. (It's an artifact with "T: Add 1. This mana can't be spent to cast a nonartifact spell.")