Most played cards in UW Control:

833 Decks
Glacial Fortress
3088 copies - 3.71 average
Irrigated Farmland
2872 copies - 3.45 average
Negate
2381 copies - 2.86 average
Cast Out
1862 copies - 2.24 average
Fumigate
1809 copies - 2.17 average
Settle the Wreckage
1710 copies - 2.05 average
Search for Azcanta
1352 copies - 1.62 average
Authority of the Consuls
1313 copies - 1.58 average
Ipnu Rivulet
1302 copies - 1.56 average
Disallow
1123 copies - 1.35 average
Glimmer of Genius
1090 copies - 1.31 average
Censor
1042 copies - 1.25 average
Champion of Wits
934 copies - 1.12 average
Regal Caracal
854 copies - 1.03 average
Approach of the Second Sun
848 copies - 1.02 average
Torrential Gearhulk
838 copies - 1.01 average
Field of Ruin
831 copies - 1 average
Essence Scatter
809 copies - 0.97 average
Chart a Course
805 copies - 0.97 average
Angel of Invention
755 copies - 0.91 average