Grid Monitor [Mirrodin] Centaur Spirit then discard three cards at

then discard three cards at random

Set: Classic Sixth Edition Type: Land Rare Cost: Whenever City of Brass becomes tapped

Set: Guilds of Ravnica Type: Creature — Nightmare Demon Rarity: Mythic Cost: {3}{B}{B} Flying

Set: Fourth Edition Type: Creature — Bird Rare Cost: {G} Flying {T}: Add one mana of any color

Set: Arabian Nights Type: Creature — Human Rare Cost: {2}{R}{R} Damage that would reduce your life total to less than 1 reduces it to 1 instead

Grid Monitor [Mirrodin] Centaur Spirit then discard three cards atSet: Mirrodin Type: Artifact Creature Construct Rare Cost: {4} You can't cast creature spells. The vedalken protect the Knowledge Pool at any cost.