Valve's contribution to the digital card game genre, Artifact, is playable at this weekend's PAX West in Seattle, Washington. Attendees can both watch others and take on friends throughout the weekend and earn a chance to "challenge a champion on the main stage". There's plenty of Artifact merchandise and swag on hand, alongside beta keys and free copies of the game on release.
In addition, Artifact will be released on Steam on November 28, 2018 for $19.99. It will also be available on Android and iOS sometime in 2019.
Learn more on the Artifact site.