Gold Card Gold Rarity Cards

Gold quality cards are the third level. They are stronger than Silver cards and tend to be Final Cards. There are only 10 Gold quality Combo cards, Bear , Energy , Science, Time, Wind, Villain, Food, Life, Space and Monster were available from limited time Portals. And the All Hallows' Eve card which had to be bought from the Halloween Pack. A Gold card gains +3/+3 when it grows in level.
Combos that result in a Gold take 24 hours to research.