Most played cards in Grixis Emerge:

1 Decks
Contingency Plan
4 copies - 4 average
Lightning Axe
4 copies - 4 average
Foreboding Ruins
4 copies - 4 average
Jace, Vryn's Prodigy
4 copies - 4 average
Stitchwing Skaab
4 copies - 4 average
Elder Deep-Fiend
4 copies - 4 average
Haunted Dead
4 copies - 4 average
Insolent Neonate
4 copies - 4 average
Shivan Reef
4 copies - 4 average
Prized Amalgam
4 copies - 4 average
Kozilek's Return
3 copies - 3 average
Fevered Visions
3 copies - 3 average
Choked Estuary
3 copies - 3 average
Dispel
2 copies - 2 average
Duress
2 copies - 2 average
Avacyn's Judgment
2 copies - 2 average
Collective Brutality
2 copies - 2 average
Rending Volley
2 copies - 2 average
Sanctum of Ugin
2 copies - 2 average
Distended Mindbender
2 copies - 2 average