Most played cards in UW Midrange:

4 Decks
Tundra
16 copies – 4 avg
Disenchant
16 copies – 4 avg
Swords to Plowshares
15 copies – 3.75 avg
Mishra's Factory
12 copies – 3 avg
City of Brass
12 copies – 3 avg
Counterspell
12 copies – 3 avg
Savannah Lions
10 copies – 2.5 avg
Serra Angel
10 copies – 2.5 avg
Lightning Bolt
10 copies – 2.5 avg
Serendib Efreet
9 copies – 2.25 avg
Jayemdae Tome
9 copies – 2.25 avg
Volcanic Island
9 copies – 2.25 avg
Divine Offering
7 copies – 1.75 avg
Red Elemental Blast
7 copies – 1.75 avg
Blue Elemental Blast
6 copies – 1.5 avg
Fellwar Stone
6 copies – 1.5 avg
Su-Chi
6 copies – 1.5 avg
Underground Sea
5 copies – 1.25 avg
Control Magic
5 copies – 1.25 avg
Plateau
5 copies – 1.25 avg