Damping Sphere [Dominaria]

Set: Dominaria Type: Artifact Rarity: Uncommon Cost: {2} If a land is tapped for two or more mana, it produces {C} instead of any other type and amount.Each spell a player casts costs {1} more to cast for each other spell that player has cast this turn. A Thran relic, it has spent ten thousand years doing absolutely nothing.