Foiling complete.

With Commander 2015 here, one of my new favorite UG cards is Biomantic Mastery. Also, would you consider Masumaro, First to Live too expensive for this deck? His ability is incredible for a deck that can draw like a maniac... just last night, my Masumaro got up to 72/72. Needless to say, it was pretty sweet.

Mastery can draw a lot of cards but doesn't do anything else. A lot of my draw also gives me a creature or doesn't require further mana input. Cards that just draw cards feel a bit too slow.

Another card that might be worth considering is Riptide Laboratory. It's an easy way to bounce your wizards for recasting, whether to save them from harm or just to re-trigger ETB effects. It works with Zegana, as well as your Fathom Mage, Momir Vig, Simic Visionary, and Prophet of Kruphix among others.

You foiled out a weak version of the deck that is lacking in any real power in a semi competitive meta... nice! In all seriousness tho it probably is pretty fun to play with a fully foiled out deck.

My local meta is only semi-semi competitive. No infinite mana here, no Avenger of Zendikar. I made it the way I want it to be, with only a few concessions to metagame.

And yeah, it is fun. I have to wear shades to crack a fetchland.

Masumaro, First to Live or Multani, Maro-Sorcerer seem like they have the potential to be pretty great in here. What do you think? If you like the idea I can make suggestions as to what you might take out.

I like maro-style cards like that, but at 6 mana each they're pretty expensive and they share a CMC with my commander which is awkward. I appreciate it though

Seems like you should have no issue with ramp here. Especially with Multani's shroud; get him out turn 5 and Zegana turn 6 and easily draw yourself 20 cards. Then you still have a ridiculously huge creature with shroud.