MTG:A is definitely the best thing you can get that isn't Hearthstone. It's like Hearthstone in the sense that if you aren't buying packs you will have a hard time making meta early on, but once you get into playing the game it's very easy to go infinite in Draft modes (Gaining more than the admission fee and repeat). The game even in the early stages has quests which can get you a few packs daily, and most quests just straight up give packs.
Definitely recommend Magic:Arena, gonna start playing much more when they implement a Friend's List and Private battles.