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You can try Turn The Tides (I'm its developer) which has 24 different boards based on the idea of reversi. You also get to use powers and there are another 24 boards with hexagonal tiles as well. You can play offline(against the iphone) or online with real players via GameCenter.
MTG Mirror.com is a free draft/sealed simulator. You can also use UnTap.in, another free site, to test the decks you made to see if they're any good
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