Most played cards in Beanstalk:

2 Decks
Force of Will
8 copies - 4 average
Orcish Bowmasters
8 copies - 4 average
Up the Beanstalk
8 copies - 4 average
Ponder
8 copies - 4 average
Brainstorm
8 copies - 4 average
Misty Rainforest
6 copies - 3 average
Flooded Strand
6 copies - 3 average
Hydroblast
5 copies - 2.5 average
Tropical Island
5 copies - 2.5 average
Underground Sea
4 copies - 2 average
Force of Vigor
4 copies - 2 average
Carpet of Flowers
4 copies - 2 average
Swords to Plowshares
4 copies - 2 average
Murktide Regent
4 copies - 2 average
Daze
4 copies - 2 average
Lórien Revealed
4 copies - 2 average
Leyline Binding
4 copies - 2 average
Force of Negation
4 copies - 2 average
Wasteland
4 copies - 2 average
Surgical Extraction
3 copies - 1.5 average