If you happened to tune into Valve’s “The International” Dota 2 esports tournament, you were treated to an announcement that seemingly came out of nowhere. Without any prior rumors to ruin the surprise, Valve teased a new game called Artifact, which is a card game themed after Dota 2. Beyond that tidbit, there is not a whole to share about

Source: Hot Hardware – Valve Teases Artifact, A New DOTA 2 Themed Trading Card Game