There is a Wizards product called Duels of the Planeswalkers that includes an updated Magic AI. $10 on the consoles or Steam. It is targeted as an entry-level way to learn Magic.
It focuses on premade decks with limited means of customization, rather than open freeform deckbuilding. (Of course they want you to start buying Magic proper to do that.) But it is the only official way to play modern Magic against an adequate AI.
http://en.wikipedia.org/wiki/Magic:_The_Gathering_–_Duels_of...
It focuses on premade decks with limited means of customization, rather than open freeform deckbuilding. (Of course they want you to start buying Magic proper to do that.) But it is the only official way to play modern Magic against an adequate AI.