Most played cards in Sliver Queen:

3 Decks
Breeding Pool
4 copies - 1.33 average
Watery Grave
3 copies - 1 average
Godless Shrine
3 copies - 1 average
Demonic Tutor
3 copies - 1 average
City of Brass
3 copies - 1 average
Overgrown Tomb
3 copies - 1 average
Swords to Plowshares
3 copies - 1 average
Hallowed Fountain
3 copies - 1 average
Sylvan Library
3 copies - 1 average
Stomping Ground
3 copies - 1 average
Command Tower
3 copies - 1 average
Temple Garden
3 copies - 1 average
Verdant Catacombs
2 copies - 0.67 average
Bayou
2 copies - 0.67 average
Toxic Deluge
2 copies - 0.67 average
Coalition Relic
2 copies - 0.67 average
Birds of Paradise
2 copies - 0.67 average
Steam Vents
2 copies - 0.67 average
Sacred Foundry
2 copies - 0.67 average
Polluted Delta
2 copies - 0.67 average