Most played cards in Sneak Red:

1 Decks
Simian Spirit Guide
4 copies - 4 average
Sneak Attack
4 copies - 4 average
Through the Breach
4 copies - 4 average
Ancient Tomb
4 copies - 4 average
Lotus Petal
4 copies - 4 average
Trinisphere
4 copies - 4 average
Chalice of the Void
4 copies - 4 average
Karn, the Great Creator
4 copies - 4 average
City of Traitors
4 copies - 4 average
Blood Sun
4 copies - 4 average
Griselbrand
3 copies - 3 average
Emrakul, the Aeons Torn
3 copies - 3 average
Abrade
3 copies - 3 average
Seething Song
2 copies - 2 average
Faerie Macabre
2 copies - 2 average
Tormod's Crypt
1 copies - 1 average
Pithing Needle
1 copies - 1 average
Walking Ballista
1 copies - 1 average
Mycosynth Lattice
1 copies - 1 average
Wurmcoil Engine
1 copies - 1 average