Mana Clash (Foil) (7ED) from Seventh Edition, available at 401 Games Canada.

• Rarity: Rare
• Finish: Foil
• Artist: Larry Elmore
• Card Text:
  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 heads on the same flip.