Most played cards in U/W/x Control:

1 Decks
Loxodon Hierarch
4 copies - 4 average
Hallowed Fountain
4 copies - 4 average
Remand
4 copies - 4 average
Resurrection
4 copies - 4 average
Wrath of God
4 copies - 4 average
Tarmogoyf
4 copies - 4 average
Compulsive Research
4 copies - 4 average
Selesnya Guildmage
4 copies - 4 average
Shadow of Doubt
4 copies - 4 average
Careful Consideration
4 copies - 4 average
Akroma, Angel of Wrath
4 copies - 4 average
Adarkar Wastes
3 copies - 3 average
Mystic Enforcer
3 copies - 3 average
Call of the Herd
2 copies - 2 average
Simic Growth Chamber
2 copies - 2 average
Simic Signet
2 copies - 2 average
Azorius Signet
2 copies - 2 average
Yavimaya Coast
2 copies - 2 average
Gemstone Mine
2 copies - 2 average
Brushland
2 copies - 2 average