Most played cards in Grxis Control:

1 Decks
Bloodstained Mire
4 copies - 4 average
Narset, Parter of Veils
4 copies - 4 average
Polluted Delta
4 copies - 4 average
Scalding Tarn
4 copies - 4 average
Plague Engineer
4 copies - 4 average
Leyline of the Void
4 copies - 4 average
Force of Will
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Baleful Strix
4 copies - 4 average
Dreadhorde Arcanist
4 copies - 4 average
True-Name Nemesis
4 copies - 4 average
Ponder
4 copies - 4 average
Drown in the Loch
4 copies - 4 average
Brainstorm
4 copies - 4 average
Kolaghan's Command
3 copies - 3 average
Pyroblast
3 copies - 3 average
Volcanic Island
2 copies - 2 average
Underground Sea
2 copies - 2 average
Snow-Covered Island
2 copies - 2 average
Snapcaster Mage
2 copies - 2 average