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Primarily Illusions, but Xenograft gives other creatures (primarily Precursor Golem) Hexproof also.
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My illusion Deck: http://www.mtgvault.com/ViewDeck.aspx?DeckID=210521 Yours seems a bit risky in some way... Only thing that I dont but I would use from your deck is Phantasmal Image if it weren't too expensive for me. Check my deck, maybe you'll get some ideas.
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The main risky thing is not getting Lord of Unreal, as he is the only hexproofing thing. Not getting him early on... uh oh.