Most played cards in BG Midrange:

1 Decks
Sphere of the Suns
4 copies - 4 average
Phyrexian Crusader
4 copies - 4 average
Glissa, the Traitor
4 copies - 4 average
Viridian Emissary
4 copies - 4 average
Perilous Myr
4 copies - 4 average
Sylvok Replica
4 copies - 4 average
Skinrender
3 copies - 3 average
Creeping Corrosion
3 copies - 3 average
Memoricide
3 copies - 3 average
Massacre Wurm
3 copies - 3 average
Moriok Replica
3 copies - 3 average
Mimic Vat
2 copies - 2 average
Geth, Lord of the Vault
2 copies - 2 average
Wurmcoil Engine
2 copies - 2 average
Go for the Throat
2 copies - 2 average
Grasp of Darkness
2 copies - 2 average
Sword of Feast and Famine
2 copies - 2 average