Most played cards in BR Midrange:

1 Decks
Rukh Egg
4 copies - 4 average
Hypnotic Specter
4 copies - 4 average
Sedge Troll
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Badlands
4 copies - 4 average
Dark Ritual
3 copies - 3 average
Red Elemental Blast
3 copies - 3 average
Fallen Angel
3 copies - 3 average
Black Vise
2 copies - 2 average
Mishra's Factory
2 copies - 2 average
Terror
2 copies - 2 average
Blood Moon
2 copies - 2 average
Nevinyrral's Disk
2 copies - 2 average
Pestilence
2 copies - 2 average
Gloom
2 copies - 2 average
Shatter
2 copies - 2 average
Animate Dead
2 copies - 2 average
Wheel of Fortune
1 copies - 1 average
Deathgrip
1 copies - 1 average
Drain Life
1 copies - 1 average