Lightning Runner (Foil) (AER) from Aether Revolt, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Foil
• Artist: Raymond Swanland
• Card Text:
  Double strike, haste
  Whenever Lightning Runner attacks, you get EE (two energy counters), then you may pay EEEEEEEE. If you pay, untap all creatures you control, and after this phase, there is an additional combat phase.