Most played cards in UR Breach:

2 Decks
Snapcaster Mage
4 copies - 2 average
Scalding Tarn
4 copies - 2 average
Serum Visions
4 copies - 2 average
Through the Breach
4 copies - 2 average
Lightning Bolt
4 copies - 2 average
Remand
3 copies - 1.5 average
Emrakul, the Aeons Torn
3 copies - 1.5 average
Madcap Experiment
3 copies - 1.5 average
Cryptic Command
3 copies - 1.5 average
Steam Vents
3 copies - 1.5 average
Dispel
3 copies - 1.5 average
Blood Moon
3 copies - 1.5 average
Desolate Lighthouse
2 copies - 1 average
Spreading Seas
2 copies - 1 average
Electrolyze
2 copies - 1 average
Platinum Emperion
2 copies - 1 average
Sulfur Falls
2 copies - 1 average
Polluted Delta
2 copies - 1 average
Anger of the Gods
2 copies - 1 average
Shatterstorm
1 copies - 0.5 average