This preview shows shop/combat phases, as well as demonstrating the matchmaking features. I've also combined the starter Stamina/Mana cards to help smooth the game out. The game systems are fully functional now, it just needs class/card design work, and some cosmetic improvements.

The way the game works, each round you buy things, and then secretly select up to 3 cards to use in the combat round. Combat is resolved fairly simply: You take damage equal to your opponent's Attack minus your Defense.

Who goes first in each round alternates, so one player doesn't always have the advantage of knowing what the first player did.