Snake Umbra (UMA) from Ultimate Masters, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Christopher Moeller
• Card Text:
  Enchant creature
  Enchanted creature gets +1/+1 and has "Whenever this creature deals damage to an opponent, you may draw a card."
  Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)