Aetherstorm Roc - Prerelease Promo (Foil) (PKLD) from Kaladesh, available at 401 Games Canada.

• Rarity: Rare
• Finish: Foil
• Artist: Scott Murphy
• Card Text:
  Flying
  Whenever Aetherstorm Roc or another creature enters the battlefield under your control, you get E (an energy counter).
  Whenever Aetherstorm Roc attacks, you may pay EE. IF you do, put a +1/+1 counter on it and tap up to one target creature defending player controls.