Most played cards in uwr:

1 Decks
Path to Exile
4 copies - 4 average
Flooded Strand
4 copies - 4 average
Snapcaster Mage
4 copies - 4 average
Scalding Tarn
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Celestial Colonnade
4 copies - 4 average
Spell Queller
4 copies - 4 average
Cryptic Command
4 copies - 4 average
Serum Visions
4 copies - 4 average
Lightning Helix
3 copies - 3 average
Logic Knot
3 copies - 3 average
Geist of Saint Traft
2 copies - 2 average
Steam Vents
2 copies - 2 average
Sulfur Falls
2 copies - 2 average
Relic of Progenitus
2 copies - 2 average
Disdainful Stroke
2 copies - 2 average
Pia and Kiran Nalaar
2 copies - 2 average
Spell Snare
2 copies - 2 average
Electrolyze
2 copies - 2 average
Hallowed Fountain
2 copies - 2 average