Artifact is a digital card game coming from the makers of Dota 2 and a collaboration with legendary card game designer Richard Garfield, creator of Magic: The Gathering.

Artifact features more than 280 cards in the shipping set, including 44 heroes, players will be able to buy and sell cards on the Steam Community Marketplace. Artifact will also be supported as a service through expansions, competitive events, and new features.

Wield your deck across three lanes of combat, answer every move of your opponent with one of your own. Unlimited hand size. Unlimited number of units you control. Unlimited mana you can employ.

It’s up to you to decide the best way to navigate the constantly shifting tide of battle.

"We hope all gamers enjoy Artifact, especially fans of Dota 2 and card gaming enthusiasts," said Valve's Gabe Newell. "Working with Richard Garfield has been an incredible opportunity for everyone at Valve, and we look forward to expanding the game with him based upon feedback and input from the community."

"Working on Artifact has been fantastic - a digital card game which really leverages what is made possible by the medium rather than being limited by it," said Richard Garfield. "That has been a long time dream of mine and Valve has been a terrific partner in the development."

Today's launch also includes the opening of the Artifact Marketplace, where owners of the game can sell and purchase cards from other players.

If you’ve played card games around a kitchen table, you know the enjoyment that can come with house rules. Artifact allows you and your friends complete control in creating a tournament. Simply select your elimination or non-elimination format and deck constraints; then, challenge your friends to a crucible of your own design.

Want to test your skill against the world at large? Valve-sponsored gauntlets and tournaments will give players the opportunity to not just play Artifact for the joy of mastery, but to win prizes based upon their level of play.

Artifact is now available worldwide via Steam (for PC, Mac, and Linux) at $19.99.