I'm thinking that a standard SG rainbow with quints replaced with Druids might work, since you can just mutate all his creatures, he has basically no CC (unless you count emergency Overdriving, which he won't do unless he has nothing on the field), and Sundial is an effective stall. I played him with a standard rainbow, got a Druid out turn 2, and turned his 12/something Colossal Dragon in to an immaterial 2|2 Deja Vu. It probably wouldn't be as good as the Rewind or anti-vamp decks played there, but still......