During playtesting it was decided that Transmogrifying Wand was just a little too polarizing for a format this slow. In a deck with many flying creatures it shuts down your opponents defenses a little too effectively and creates unfun play patterns.
Winterflame wasn't the worst, but UR was, so it needs some juice.
Murktide is probably too strong.
Most were ok to great, but poor, old Secret Plans...
Mindswipe -> Prophetic Bolt
Avalanche Tusker looks like it should be a cool card, but then you get to the end of the text and realize it's understatted with no keywords.
I'm swapping the 5 common Banners for the 5 uncommon Crystals. To balance rarities out, I'm swapping 5 other uncommons for commons.