What are the Promo Cards?
Limited edition cards for early adopters.
The Tech-pioneer cards

How do I get one of these cards?

If you signed up to the Synergy of Serra website before the Alpha testing phase started then you will receive one of these very special cards.
If not, the only other way to own one is to buy one from another player on the Marketplace. That is, if someone is willing sell.
Promo B card's animation
Promo C card's animation
Promo A card's animation