Most played cards in Eldrazi:

1 Decks
Spatial Contortion
4 copies - 4 average
Smuggler's Copter
4 copies - 4 average
Ghostfire Blade
4 copies - 4 average
Caves of Koilos
4 copies - 4 average
Thought-Knot Seer
4 copies - 4 average
Reaver Drone
4 copies - 4 average
Bearer of Silence
4 copies - 4 average
Hangarback Walker
4 copies - 4 average
Matter Reshaper
4 copies - 4 average
Endless One
3 copies - 3 average
Sea Gate Wreckage
3 copies - 3 average
Duress
3 copies - 3 average
Murderous Cut
3 copies - 3 average
Reality Smasher
2 copies - 2 average
Collective Brutality
2 copies - 2 average
Stain the Mind
2 copies - 2 average
Tomb of the Spirit Dragon
2 copies - 2 average
Ruins of Oran-Rief
2 copies - 2 average
Mirrorpool
2 copies - 2 average
Blighted Fen
2 copies - 2 average