Deepfathom Skulker (OGW) from Oath of the Gatewatch, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Joseph Meehan
• Card Text:
  Devoid (This card has no color.)
  Whenever a creature you control deals combat damage to a player, you may draw a card.
  3C: Target creature can't be blocked this turn. (C represents colorless mana.)