Most played cards in U/G Tron:

1 Decks
Urza's Power Plant
4 copies - 4 average
Gifts Ungiven
4 copies - 4 average
Urza's Tower
4 copies - 4 average
Thirst for Knowledge
4 copies - 4 average
Chrome Mox
4 copies - 4 average
Urza's Mine
4 copies - 4 average
Chalice of the Void
4 copies - 4 average
Simic Signet
4 copies - 4 average
Repeal
3 copies - 3 average
Remand
3 copies - 3 average
Spell Snare
3 copies - 3 average
Condescend
3 copies - 3 average
Tolaria West
3 copies - 3 average
Threads of Disloyalty
3 copies - 3 average
Hurkyl's Recall
3 copies - 3 average
Trinisphere
2 copies - 2 average
Tormod's Crypt
2 copies - 2 average
Sundering Titan
2 copies - 2 average
Bottle Gnomes
2 copies - 2 average
Breeding Pool
2 copies - 2 average