Magic: The Gathering Arena has been in open beta for several weeks. Over the course of OBT, players have been asking for an option to challenge their friends to TCG combat. The community asked and the developers have listened. Starting November 15th, players will be able to use the Direct Challenge feature to take on friends and rivals in 1v1 combat.
Magic: The Gathering Arena is described as: "The original and the deepest strategy card game gets the video game it deserves. Play Magic, collect cards, build decks and show off your skills."
Learn more on the Magic: The Gathering Arena site.