During each player’s upkeep, count the number of permanents. If that number is odd, all red creatures get +1/+1 and mountains produce an additional R when tapped for mana until end of turn. If the number is even, all red creatures get -1/-1 and mountains produce colorless mana instead of their normal mana until end of turn.
Card Type
Enchantment
Rarity
Rare
Edition
Ice Age
Condition
Near Mint
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