Most played cards in 4c Emerge:

2 Decks
Prized Amalgam
8 copies - 4 average
Jace, Vryn's Prodigy
8 copies - 4 average
Haunted Dead
8 copies - 4 average
Gather the Pack
8 copies - 4 average
Evolving Wilds
8 copies - 4 average
Traverse the Ulvenwald
8 copies - 4 average
Kozilek's Return
8 copies - 4 average
Elder Deep-Fiend
8 copies - 4 average
Grapple with the Past
8 copies - 4 average
Llanowar Wastes
8 copies - 4 average
Yavimaya Coast
7 copies - 3.5 average
Noose Constrictor
6 copies - 3 average
Lumbering Falls
4 copies - 2 average
Ishkanah, Grafwidow
4 copies - 2 average
Gnarlwood Dryad
3 copies - 1.5 average
Ultimate Price
3 copies - 1.5 average
Sunken Hollow
3 copies - 1.5 average
Transgress the Mind
3 copies - 1.5 average
Nissa, Vastwood Seer
3 copies - 1.5 average
Painful Truths
2 copies - 1 average