Most played cards in Grixis Control:

1 Decks
Polluted Delta
4 copies - 4 average
Force of Will
4 copies - 4 average
Brainstorm
4 copies - 4 average
Ponder
4 copies - 4 average
Snapcaster Mage
4 copies - 4 average
Baleful Strix
4 copies - 4 average
Scalding Tarn
3 copies - 3 average
Underground Sea
3 copies - 3 average
True-Name Nemesis
2 copies - 2 average
Blood Moon
2 copies - 2 average
Bloodstained Mire
2 copies - 2 average
Surgical Extraction
2 copies - 2 average
Pyroblast
2 copies - 2 average
Jace, the Mind Sculptor
2 copies - 2 average
Liliana's Triumph
2 copies - 2 average
Lightning Bolt
2 copies - 2 average
Fatal Push
2 copies - 2 average
Kolaghan's Command
2 copies - 2 average
Rise // Fall
2 copies - 2 average
Unearth
2 copies - 2 average