Most played cards in Eldrazi Tron:

1 Decks
Urza's Mine
4 copies - 4 average
Urza's Power Plant
4 copies - 4 average
Urza's Tower
4 copies - 4 average
Chalice of the Void
4 copies - 4 average
Eldrazi Temple
4 copies - 4 average
Expedition Map
4 copies - 4 average
Reality Smasher
4 copies - 4 average
Matter Reshaper
4 copies - 4 average
Thought-Knot Seer
4 copies - 4 average
Karn, the Great Creator
4 copies - 4 average
Walking Ballista
3 copies - 3 average
Ghost Quarter
3 copies - 3 average
Mind Stone
2 copies - 2 average
Surgical Extraction
2 copies - 2 average
Dismember
2 copies - 2 average
Ugin, the Ineffable
2 copies - 2 average
All Is Dust
2 copies - 2 average
Wastes
2 copies - 2 average
Blast Zone
2 copies - 2 average
Tormod's Crypt
1 copies - 1 average