Most played cards in W/B Control:

1 Decks
Grasp of Darkness
4 copies - 4 average
Caves of Koilos
4 copies - 4 average
Shambling Vent
4 copies - 4 average
Duress
3 copies - 3 average
Transgress the Mind
3 copies - 3 average
Languish
3 copies - 3 average
Forsaken Sanctuary
3 copies - 3 average
Liliana, the Last Hope
3 copies - 3 average
Read the Bones
2 copies - 2 average
Bruna, the Fading Light
2 copies - 2 average
Ruinous Path
2 copies - 2 average
Virulent Plague
2 copies - 2 average
Hallowed Moonlight
2 copies - 2 average
Gisela, the Broken Blade
2 copies - 2 average
Thalia's Lancers
2 copies - 2 average
Ultimate Price
2 copies - 2 average
Murder
2 copies - 2 average
Ob Nixilis Reignited
2 copies - 2 average
Gideon, Ally of Zendikar
2 copies - 2 average
Thalia, Heretic Cathar
2 copies - 2 average