Shiny Impetus (MKC) from Murders at Karlov Manor Commander, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Svetlin Velinov
• Card Text:
  Enchant creature
  Enchanted creature gets +2/+2 and is goaded. (It attacks each combat if able and attacks a player other than you if able.)
  Whenever enchanted creature attacks, you create a Treasure token. (It’s an artifact with “T, Sacrifice this artifact: Add one mana of any color.”)