Goldspan Dragon is a mythic Creature — Dragon card from Kaldheim (KHM), collector number 358. Current market price: $19.24 (foil $29.75), TCGplayer market prices via Scryfall.
Flying, haste Whenever this creature 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."