Before the computer plays the "markhov library draw two cards" card, do you check if the computer has already the maximum no of cards? seems to me he had already maximum and tried using it.
For once Ill make a constructive comment : the player should be able to consult the instant card that were just played by the computer. For example the comp keeps using frailty but I don't know wht it is and can't really think strategically about it. Another example : in real life card playing, it is frequent that you check the card that has just been played ba the opponent, to really understand what just happen and be better prepared about it. Dont be mistaken Im a huge addict about your game, comments are only suggestions how to make it even better! congrats!!
its not the same power system as magic, so don't say its a rip-off
by the way, magic wasnt the first card game, it was also "inspired" from other games.. stop whining!