Challenge Set #3 (spoilers)

I actually don't have any strategies yet, since that's for you guys to figure out
But I'm curious if people are able to beat the 3 that have been stumping me for the last month:
Enchanted Evening, Urza Wannabe, and Gimme. I've managed to get to round 6 or 7 in each of these, but have never pulled out a win.
One little tidbit of information: these challenge are only 9 rounds long, and the last round is a mirror match.

Enchanted Evening, Urza Wannabe, and Gimme. I've managed to get to round 6 or 7 in each of these, but have never pulled out a win.
One little tidbit of information: these challenge are only 9 rounds long, and the last round is a mirror match.