Psychic Allergy | Magic: The Gathering
Formats Psychic Allergy is Legal in
Official Oracle Text for Psychic Allergy
At the beginning of each opponent's upkeep, Psychic Allergy deals X damage to that player, where X is the number of nontoken permanents of the chosen color he or she controls.
At the beginning of your upkeep, destroy Psychic Allergy unless you sacrifice two Islands.