Most played cards in U/W Control:

1 Decks
Oblivion Ring
4 copies - 4 average
Pestermite
4 copies - 4 average
Sower of Temptation
4 copies - 4 average
Reveillark
4 copies - 4 average
Wanderwine Hub
4 copies - 4 average
Mulldrifter
4 copies - 4 average
Mirror Entity
4 copies - 4 average
Cryptic Command
4 copies - 4 average
Wispmare
4 copies - 4 average
Broken Ambitions
4 copies - 4 average
Austere Command
3 copies - 3 average
Crib Swap
3 copies - 3 average
Vivid Creek
2 copies - 2 average
Twilight Shepherd
2 copies - 2 average
Ego Erasure
2 copies - 2 average
Reflecting Pool
2 copies - 2 average
Pollen Lullaby
1 copies - 1 average
Godhead of Awe
1 copies - 1 average
Prison Term
1 copies - 1 average
Mystic Gate
1 copies - 1 average