This is my current deck that I have recently built. I am considering running it in the next local JSS, but I want to know of any good ideas for the MD and I need to construct a SB.

4 Urzas Mine
4 Urzas Tower
4 Urzas PowerPlant
4 Tree of Tales
2 Forest
5 Mountain

4 Atog
1 Myr Incubator
2 Bosh
2 MindSlaver
1 Skeleton Shard
4 Shrapnel Blast
3 Planar Portal
4 Talisman of Impulse
4 Lightning Greaves
4 Myr Retriever
1 Obliterate
4 Sylvan Scrying
3 Grab the Reins

The deck wins by two ways consistently. First, get urzatron out and play bosh, hopefully with a greaves already in play, on turn 4 and swing. repeat next turn and then throw bosh.
second, activate the incubator, play atog, pump, throw atog with the reins.
the other 2 ways ive won is by infinte mindslaver-enabled turns, and with the 4 shrapnel blasts.
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Me likey!! The only thing I would suggest is mabey 1 platinum angel and mabey some cloudposts?