I love the idea behind the game. Strategy games like this are always great. However there are some flaws:
a) Book of Magic is way overpowered. You always kill in the same turn you get to use it.
b) The game is too easy to beat. As soon as I learned "destroy all skulls" I didn't lose a single match (and I think with what I learned by now, I shouldn't have lost a single one). The AI is just to bad at playing that game. Now they do see all possible extra turns, but they don't consider follow-up movement at all.
c) I think there should be a limit to extra turns. That would make the game more balanced.