Most played cards in Stiflenaught:

2 Decks
Counterspell
8 copies - 4 average
Stifle
8 copies - 4 average
Vision Charm
8 copies - 4 average
Phyrexian Dreadnought
8 copies - 4 average
Annul
6 copies - 3 average
Hydroblast
4 copies - 2 average
Foil
4 copies - 2 average
Gush
4 copies - 2 average
Accumulated Knowledge
4 copies - 2 average
Impulse
4 copies - 2 average
Portent
4 copies - 2 average
Daze
4 copies - 2 average
Opt
4 copies - 2 average
Nevinyrral's Disk
3 copies - 1.5 average
Parallax Tide
3 copies - 1.5 average
Mana Leak
3 copies - 1.5 average
Chain of Vapor
3 copies - 1.5 average
Defense Grid
3 copies - 1.5 average
Back to Basics
3 copies - 1.5 average
Propaganda
3 copies - 1.5 average