Cold-Foil is a slightly different variant of foil and is used to enhance the background of the Rare to Legendary cards, whereas your Enchanted cards have a more traditional full holo-foil print design
He also brings a competitive aspect to the game buffing your in-play Princess characters
Rubys Rare and Super-Rare cards all reward for you winning challenges, including Aladdin: Heroic Outlaw, Raya: Leader of Heart, and Shere Khan: Menacing Predator
Cards like Lilo, Making a Wish and Stitch, New Dog were just two of the many cheap threats packed into the amber/x aggro shell, with the purpose of getting characters into play as fast as possible, and then using some number of Lanterns or shifting using Stitch, New Dog to get Stitch, Rock Star into play ahead of curve
With each additional expansion set added to the game, two more starter decks join the ranks