Most played cards in 4c Goodstuff:

2 Decks
Lightning Bolt
8 copies - 4 average
Underground Sea
8 copies - 4 average
Badlands
8 copies - 4 average
Hypnotic Specter
8 copies - 4 average
Disenchant
8 copies - 4 average
Scrubland
7 copies - 3.5 average
Sedge Troll
7 copies - 3.5 average
Swords to Plowshares
7 copies - 3.5 average
City of Brass
7 copies - 3.5 average
Energy Flux
5 copies - 2.5 average
Strip Mine
5 copies - 2.5 average
Hymn to Tourach
4 copies - 2 average
Tundra
4 copies - 2 average
Divine Offering
4 copies - 2 average
Blue Elemental Blast
4 copies - 2 average
Sinkhole
4 copies - 2 average
Serendib Efreet
4 copies - 2 average
Underworld Dreams
3 copies - 1.5 average
Sengir Vampire
3 copies - 1.5 average
Red Elemental Blast
3 copies - 1.5 average