fix my land deck!

ok. Zendikar being the land set, can you see any cards in the spoiler that would supplement or replace cards in this deck? the objective is to get Exploration and Horn of Greed out to get land and cards, then Heartbeat to power a mana-floated Upheaval and a hapless opponent.

2 Azusa, Lost but Seeking
3 Fathom Seer
1 Meloku the Clouded Mirror
2 Mystic Snake
2 Soratami Savant
4 Counterspell
1 Gush
1 Research (Research/Development)
4 Serum Visions
1 Time Spiral
2 Upheaval
4 Exploration
3 Heartbeat of Spring
4 Horn of Greed
1 Lion's Eye Diamond
8 Forest
16 Island
1 Oboro, Palace in the Clouds

Sideboard
1 Meloku the Clouded Mirror
1 Ovinomancer
1 Patron of the Moon
1 Sasaya, Orochi Ascendant
1 Uyo, Silent Prophet
1 Ensnare
3 Gush
1 Thwart

I'd flush the whole thing down the toilet, since it's evil crap and all....

But yeah, you need to add a few Lotus Cobras to this deck, you could probably Upheaval with a ton of mana like turn 4 or 5 easily.