Most played cards in Urza:

1 Decks
Force of Will
4 copies - 4 average
Pyroblast
4 copies - 4 average
Urza, Lord High Artificer
3 copies - 3 average
Preordain
3 copies - 3 average
Volcanic Island
3 copies - 3 average
By Force
3 copies - 3 average
Scalding Tarn
3 copies - 3 average
Polluted Delta
3 copies - 3 average
Snow-Covered Island
2 copies - 2 average
Underground Sea
2 copies - 2 average
Flooded Strand
2 copies - 2 average
Flusterstorm
2 copies - 2 average
Force of Negation
2 copies - 2 average
Soul-Guide Lantern
2 copies - 2 average
Dack Fayden
2 copies - 2 average
Lightning Bolt
2 copies - 2 average
Mox Pearl
1 copies - 1 average
Mox Jet
1 copies - 1 average
Narset, Parter of Veils
1 copies - 1 average
Mox Ruby
1 copies - 1 average