Mana Vortex DRK/31

Set: The Dark
Collector Code: DRK/31
Name: Mana Vortex
Type: Enchantment
Oracle text: When you cast this spell, counter it unless you sacrifice a land. At the beginning of each player's upkeep, that player sacrifices a land of their choice. When there are no lands on the battlefield, sacrifice this enchantment.
Rarity: Rare