Most played cards in 5C Control:

2 Decks
City of Brass
8 copies - 4 average
Disenchant
8 copies - 4 average
Swords to Plowshares
8 copies - 4 average
Counterspell
8 copies - 4 average
Blue Elemental Blast
6 copies - 3 average
Red Elemental Blast
6 copies - 3 average
Volcanic Island
6 copies - 3 average
Fellwar Stone
6 copies - 3 average
Tundra
6 copies - 3 average
Fireball
4 copies - 2 average
Underground Sea
4 copies - 2 average
Power Sink
4 copies - 2 average
Sol'kanar the Swamp King
4 copies - 2 average
Earthquake
4 copies - 2 average
Sol Ring
2 copies - 1 average
Mox Ruby
2 copies - 1 average
Mox Pearl
2 copies - 1 average
Mox Sapphire
2 copies - 1 average
Library of Alexandria
2 copies - 1 average
Karma
2 copies - 1 average