Most played cards in Sneak Show:

2 Decks
Force of Will
8 copies - 4 average
Brainstorm
8 copies - 4 average
Lotus Petal
8 copies - 4 average
Ponder
8 copies - 4 average
Show and Tell
8 copies - 4 average
Ancient Tomb
7 copies - 3.5 average
Griselbrand
7 copies - 3.5 average
Sneak Attack
7 copies - 3.5 average
Flooded Strand
6 copies - 3 average
Scalding Tarn
6 copies - 3 average
Emrakul, the Aeons Torn
6 copies - 3 average
Preordain
6 copies - 3 average
Surgical Extraction
5 copies - 2.5 average
Blood Moon
5 copies - 2.5 average
Volcanic Island
4 copies - 2 average
Vesuvan Drifter
4 copies - 2 average
City of Traitors
4 copies - 2 average
Meltdown
4 copies - 2 average
Snow-Covered Island
3 copies - 1.5 average
Daze
3 copies - 1.5 average