Most played cards in Jace Control:

2 Decks
Force of Will
8 copies - 4 average
Dark Confidant
8 copies - 4 average
Underground Sea
6 copies - 3 average
Snapcaster Mage
5 copies - 2.5 average
Yixlid Jailer
5 copies - 2.5 average
Flusterstorm
4 copies - 2 average
Ingot Chewer
4 copies - 2 average
Scalding Tarn
4 copies - 2 average
Mana Drain
4 copies - 2 average
Misty Rainforest
4 copies - 2 average
Time Walk
3 copies - 1.5 average
Surgical Extraction
3 copies - 1.5 average
Nature's Claim
3 copies - 1.5 average
Mental Misstep
3 copies - 1.5 average
Black Lotus
2 copies - 1 average
Blightsteel Colossus
2 copies - 1 average
Voltaic Key
2 copies - 1 average
Volcanic Island
2 copies - 1 average
Abrupt Decay
2 copies - 1 average
Polluted Delta
2 copies - 1 average