Most played cards in UWB Skies:

1 Decks
Underground Sea
4 copies - 4 average
Serendib Efreet
4 copies - 4 average
Hypnotic Specter
4 copies - 4 average
Disenchant
4 copies - 4 average
Swords to Plowshares
4 copies - 4 average
Counterspell
4 copies - 4 average
Tundra
4 copies - 4 average
Blue Elemental Blast
3 copies - 3 average
City of Brass
3 copies - 3 average
Serra Angel
3 copies - 3 average
Scrubland
2 copies - 2 average
Moat
2 copies - 2 average
Divine Offering
2 copies - 2 average
Psionic Blast
2 copies - 2 average
Power Sink
2 copies - 2 average
Terror
2 copies - 2 average
Mana Drain
1 copies - 1 average
Greater Realm of Preservation
1 copies - 1 average
Sengir Vampire
1 copies - 1 average
Maze of Ith
1 copies - 1 average