Mega Charizard Y ex - 294/217 - Mega Hyper Rare from Mega Evolution: Ascended Heroes, available at 401 Games Canada.

• Rarity: Mega Hyper Rare
• Finish: Holofoil
• Artist: aky CG Works
• Card Text:
  [RRC] Explosion Y
  Discard 3 Energy from this Pokemon, and this attack does 280 damage to 1 of your opponent's Pokemon. (Don't apply Weakness and Resistance for Benched Pokemon.)