While you control it, cards that are "decorated" (which the card uses to refer to cards with "premium" foil, alternate art or frames, and promo cards) have a miracle cost of one snow mana (which means that you can play the card for one snow mana if it's the first card you drew that turn)
Here as a foil promo card, Lillies Clefairy ex puts pressure on Dragon-type Pokmon, and it becomes more powerful with friends on the Bench
On the other hand, the goal of counterfeit cards is literally to fool people into thinking they are real cards, either for tournament play or to make a profit by selling the cards to unsuspecting players, which makes counterfeit card "proxies" problematic
Sigarda decks favor anything from generally good human creatures like Champion of Lambholt to more specific lord effects, like the kind youll find on Giada, Font of Hope and Katilda, Dawnhart Prime