Most played cards in Slivers:

5 Decks
Muscle Sliver
20 copies - 4 average
Crystalline Sliver
20 copies - 4 average
Swords to Plowshares
20 copies - 4 average
Duress
19 copies - 3.8 average
Gemstone Mine
14 copies - 2.8 average
Undiscovered Paradise
12 copies - 2.4 average
Plated Sliver
12 copies - 2.4 average
Portent
10 copies - 2 average
Hibernation Sliver
9 copies - 1.8 average
Mox Diamond
9 copies - 1.8 average
Stifle
8 copies - 1.6 average
Land Tax
8 copies - 1.6 average
City of Brass
8 copies - 1.6 average
Armageddon
8 copies - 1.6 average
Winged Sliver
8 copies - 1.6 average
Caves of Koilos
7 copies - 1.4 average
Meddling Mage
6 copies - 1.2 average
Dromar's Cavern
6 copies - 1.2 average
Scroll Rack
6 copies - 1.2 average
Cabal Therapy
5 copies - 1 average