Chaos Moon

Oracle Text

At the beginning of each upkeep, count the number of permanents. If the number is odd, until end of turn, red creatures get +1/+1 and whenever a player taps a Mountain for mana, that player adds an additional R. If the number is even, until end of turn, red creatures get -1/-1 and if a player taps a Mountain for mana, that Mountain produces colorless mana instead of any other type.

Card Rulings

5/1/2006 In Two-Headed Giant, triggers only once per upkeep, not once for each player.

Additional Information