The basic game mechanic and deck building is okay, though AFAICT there is no help in figuring out the mechanics beyond the bare minimum basics. And it is fairly rich/complicated.
The real problem is that is *all* that the game offers. Theres two modes: so-called Story Mode, which has literally no story at all, and literally the only information you are given is reused flavor text from a bunch of Magic cards in this mode you go up against some deck controlled by the AI. Theres also Quick Battle where you go up against *different* decks, controlled by the AI. The Quick Battle decks are other players decks but it doesnt matter what the deck is because the AI is an idiot. The Quick Battle has a ranking system and you get rewards but it feels like the only challenge is not to play the best, but to play the most.
The game manages to be compelling without being at all rewarding.