Most played cards in UW Weenie:

1 Decks
Glowrider
4 copies - 4 average
Weathered Wayfarer
4 copies - 4 average
Sphere of Resistance
4 copies - 4 average
Meddling Mage
4 copies - 4 average
True Believer
4 copies - 4 average
Wasteland
4 copies - 4 average
Tundra
4 copies - 4 average
Flooded Strand
4 copies - 4 average
Mother of Runes
4 copies - 4 average
Swords to Plowshares
4 copies - 4 average
Soltari Priest
3 copies - 3 average
Disenchant
3 copies - 3 average
Ancient Tomb
3 copies - 3 average
Tormod's Crypt
3 copies - 3 average
Crusade
2 copies - 2 average
Null Rod
2 copies - 2 average
Exalted Angel
2 copies - 2 average
Worship
2 copies - 2 average
Ancestral Recall
1 copies - 1 average
Mox Emerald
1 copies - 1 average