Most played cards in Rock and Flow:

1 Decks
Thoughtseize
4 copies - 4 average
Tarmogoyf
4 copies - 4 average
Putrefy
4 copies - 4 average
Wooded Foothills
4 copies - 4 average
Birds of Paradise
4 copies - 4 average
Troll Ascetic
4 copies - 4 average
Smother
4 copies - 4 average
Dark Confidant
4 copies - 4 average
Destructive Flow
4 copies - 4 average
Call of the Herd
3 copies - 3 average
Leyline of the Void
3 copies - 3 average
Duress
3 copies - 3 average
Umezawa's Jitte
3 copies - 3 average
Ancient Grudge
3 copies - 3 average
Krosan Grip
2 copies - 2 average
Flametongue Kavu
2 copies - 2 average
Sword of Fire and Ice
2 copies - 2 average
Chrome Mox
2 copies - 2 average
Overgrown Tomb
2 copies - 2 average
copies - 0 average