Hi, awesome job!
Couple of bugs I found...
AI seems to stall when playing a
Squadron Hawk at the phase where it searches for more hawks, the white box doesn't display anything like waiting for AI and I've found this on all the difficulties. Second is that the
Oracle of Mul Daya shows up in the white creatures list for zendikar, doesn't have any text in the white box presented when you mouse over the card(more cosmetic as the card pic has this), also I can't seem to draw my top card when it is a land(not quite sure how anyways). I also seem to have a problem located
Inkmoth Nexus(was only able to get it in a deck through importing). Lastly the
Avenger of Zendikar makes plant tokens for both mine and my opponents lands instead of just mine. Also I'd like to make some card requests:
Valakut, the Molten Pinnacle (Zendikar)
Explore (Worldwake)
Harrow (Zendikar)
Quest for the Holy Relic (Zendikar)
These cards along with the sets you are already working on should make pretty much all current standard decks creatable

.