Most played cards in Izzet:

1 Decks
Aether Hub
4 copies - 4 average
Magma Spray
4 copies - 4 average
Canyon Slough
4 copies - 4 average
Drowned Catacomb
4 copies - 4 average
Spirebluff Canal
4 copies - 4 average
Harnessed Lightning
4 copies - 4 average
Whirler Virtuoso
4 copies - 4 average
Opt
4 copies - 4 average
Censor
4 copies - 4 average
Glimmer of Genius
4 copies - 4 average
Negate
3 copies - 3 average
Torrential Gearhulk
3 copies - 3 average
The Scarab God
3 copies - 3 average
Supreme Will
3 copies - 3 average
Essence Scatter
3 copies - 3 average
Dreamstealer
2 copies - 2 average
Abrade
2 copies - 2 average
Disallow
2 copies - 2 average
Sweltering Suns
2 copies - 2 average
Battle at the Bridge
2 copies - 2 average