Birthing Hulk (OGW) from Oath of the Gatewatch, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Jack Wang
• Card Text:
  Devoid (This card has no color.)
  When Birthing Hulk enters the battlefield, put two 1/1 colorless Eldrazi Scion creature tokens onto the battlefield. They have "Sacrifice this creature: Add C to your mana pool." (C represents colorless mana.)
  1C: Regenerate Birthing Hulk.