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'You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up...
'You don't lose unspent green mana as steps and phases end.
Omnath gets +1/+1 for each unspent green mana you have.
'As this artifact enters, choose a creature type. This artifact enters with a fellowship counter on it for each creature you control of the chosen type. Creatures you control of...
'Search your library for any number of land cards, exile them, then shuffle.
'Create a token that's a copy of target creature you control, except it has haste and "At the beginning of the end step, sacrifice this token." Flashback {2}{R}{R} (You may...
'Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.
'Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.
'Sliver creatures you control have "{T}: Add one mana of any color."
'Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.
'Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.
'Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.
'Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.