The computer AI for MTG Forge is incredibly dumb. It just tries to play a card at random, pure and simple. But since you don’t know what card the computer is holding, the computer seems intelligent. Yesterday the computer did the absolutely best play; it played Wojek Embermage and then Hunted Troll on the next turn. Then it used Wojek’s ability to kill off the tokens that the Troll made. It was an amazing play from a computer that only plays random cards. If you didn’t know the computer was so dumb, you could mistake it for intelligent.
Granted sometimes it makes the worst play ever, usually involving Wrath of God. For example, the computer sometimes plays a creature and then Wrath, which is utterly stupid of course. Even most beginners don’t make a mistake like that, but the computer doesn’t learn like a beginner either. Most cards only do something bad for your opponent, and the computer seems very intelligent when playing with those kinds of cards, but the computer doesn’t seem so intelligent when playing cards that have a drawback.