Peema Aether-Seer (AER) from Aether Revolt, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Howard Lyon
• Card Text:
  When Peema Aether-Seer enters the battlefield, you get an amount of E (energy counters) equal to the greatest power among creatures you control.
  Pay EEE: Target creature blocks this turn if able.