He played Ghostmare all 5 games but I was ready with a counter:
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Lost 2 games b/c I didn't draw any creatures
Ok, so first game I used this:
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His PC rush didn't stand much of a chance against denial + RT spam.
Second game:
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5rg 5rg 5rg 5rg 5rg 5rk 5rk 5rk 5rm 5rm 5ro 5ro 5ro 5ru 5ru 5ru 5ru 5ru 5ru 5t2 5t2 5t2 5t2 5t2 7q0 7q0 7q0 7ri 7ri 7ri 8ps
This time there were Discords on his side which destroyed me in the early turns and later he even had Antimatter, so no chance for me to come back.
Third and Fourth game:
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The third I simply lost because he made a turn two Dune Scorp. No way I could have come back from that. I used the deck again because I liked it in testing and was rewarded by facing his Discord deck again. Slowed him down with RT, drew some cards with the Hourglass, eventually played Wings to block his damage and RT'd the creatures he AM'd.
Fifth game:
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5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rk 5rk 5rk 5rk 5ro 5ro 5rt 5rt 5rt 5rt 5rt 5rt 6u2 6u2 6u2 6u2 6u2 6u2 8pj
I didn't really want to play Dunes as I don't really like them but I thought it was necessary based on which deck he and I had played so far. It's not really an optimized version as I made it basically on the spot, but it still got there vs his CC rush.