Most played cards in Sneak Show:

3 Decks
Force of Will
12 copies - 4 average
Lotus Petal
12 copies - 4 average
Ponder
12 copies - 4 average
Brainstorm
12 copies - 4 average
Show and Tell
12 copies - 4 average
Sneak Attack
11 copies - 3.67 average
Scalding Tarn
10 copies - 3.33 average
Ancient Tomb
10 copies - 3.33 average
Emrakul, the Aeons Torn
8 copies - 2.67 average
Griselbrand
7 copies - 2.33 average
Flooded Strand
7 copies - 2.33 average
Volcanic Island
7 copies - 2.33 average
Preordain
6 copies - 2 average
City of Traitors
6 copies - 2 average
Blood Moon
5 copies - 1.67 average
Surgical Extraction
5 copies - 1.67 average
Spell Pierce
5 copies - 1.67 average
Pyroblast
4 copies - 1.33 average
Grafdigger's Cage
4 copies - 1.33 average
Misty Rainforest
4 copies - 1.33 average