Most played cards in Grixis Control:

92 Decks
Force of Will
368 copies - 4 average
Brainstorm
368 copies - 4 average
Ponder
357 copies - 3.88 average
Polluted Delta
346 copies - 3.76 average
Scalding Tarn
296 copies - 3.22 average
Baleful Strix
290 copies - 3.15 average
Lightning Bolt
274 copies - 2.98 average
Underground Sea
248 copies - 2.7 average
Volcanic Island
225 copies - 2.45 average
Pyroblast
210 copies - 2.28 average
Snapcaster Mage
197 copies - 2.14 average
Kolaghan's Command
165 copies - 1.79 average
Bloodstained Mire
156 copies - 1.7 average
Fatal Push
149 copies - 1.62 average
Force of Negation
120 copies - 1.3 average
Mishra's Bauble
117 copies - 1.27 average
Plague Engineer
112 copies - 1.22 average
Hymn to Tourach
110 copies - 1.2 average
Badlands
108 copies - 1.17 average
Dreadhorde Arcanist
106 copies - 1.15 average