Most played cards in UBx Shadow:

1 Decks
Thoughtseize
4 copies - 4 average
Death's Shadow
4 copies - 4 average
Polluted Delta
4 copies - 4 average
Thought Scour
4 copies - 4 average
Serum Visions
4 copies - 4 average
Bloodstained Mire
4 copies - 4 average
Gurmag Angler
4 copies - 4 average
Street Wraith
4 copies - 4 average
Stubborn Denial
4 copies - 4 average
Scalding Tarn
3 copies - 3 average
Fatal Push
3 copies - 3 average
Snapcaster Mage
3 copies - 3 average
Collective Brutality
3 copies - 3 average
Disdainful Stroke
3 copies - 3 average
Watery Grave
2 copies - 2 average
Spell Snare
2 copies - 2 average
Plague Engineer
2 copies - 2 average
Blood Crypt
2 copies - 2 average
Kolaghan's Command
2 copies - 2 average
Dismember
2 copies - 2 average