Careful Study (Dave Humpherys) [World Championship Decks 2003] Guilds of Ravnica Promos Discard a card: Counter target

Discard a card: Counter target spell if it has the same converted mana cost as the discarded card

Set: Pro Tour Promos Type: Legendary Planeswalker — Liliana Rarity: Mythic Cost: {1}{B}{B} +1: Each player discards a card

yielding visions of perfection

Set: Conspiracy: Take the Crown Type: Creature — Elemental Beast Common Cost: {1}{R} Whenever you cast an instant or sorcery spell

Careful Study (Dave Humpherys) [World Championship Decks 2003] Guilds of Ravnica Promos Discard a card: Counter targetSet: World Championship Decks 2003 Type: Sorcery Rarity: Common Cost: {U} Draw two cards, then discard two cards. Books are like cropsthey must be thinned for best yield.