Not too long ago it was announced that Scrolls would be entering its Alpha stage soon. That came quicker than expected and registrants for the Alpha are being randomly selected and sent e-mails today. If you aren’t selected right away then don’t worry, Mojang will be gradually sending out e-mails over time to let more and more people in. However if you haven’t not registered then you’ll have to wait until the Beta version comes out to get a chance to play the game.
Players participating in the Alpha testing will have access to deck buidling, single player, and multiplayer. More will be added as time goes by obviously as Mojang will be using the same subscription model they used with Minecraft. As for what’s going to be added we will just have to wait and find out.