Goldspan Dragon - Promo Pack (PKHM) from Kaldheim, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Normal
• Artist: Andrew Mar
• Card Text:
  Flying, haste
  Whenever Goldspan Dragon attacks or becomes the target of a spell, create a Treasure token.
  Treasures you control have “T, Sacrifice this artifact: Add two mana of any one color.”