A much simpler remake of the older "Magic The Gathering: Online" game. There's not as much deck customizeability as there was in the first online version of the game, but there's also not any microtransactions or money sink either. So if you're looking for MTG without the headache of having to purchase & trade your way to an awesome deck (or ten) then this game's going to be everything you're looking for. If your favorite part was the deck building, then you might not like the way MTG went with this iteration.
If you've never played MTG (online or physical) then it's a card game that set the standard for card games. If you like strategic card games and simple math, then this game's perfect for you. It ramps up pretty quickly, but this iteration of MTG:O does a better version of showing you the ropes than previous versions and/or your buddy would.