Most played cards in U/r Fevered Burn:

2 Decks
Fevered Visions
8 copies - 4 average
Shivan Reef
8 copies - 4 average
Fiery Temper
8 copies - 4 average
Wandering Fumarole
8 copies - 4 average
Collective Defiance
8 copies - 4 average
Thermo-Alchemist
8 copies - 4 average
Incendiary Flow
8 copies - 4 average
Fiery Impulse
7 copies - 3.5 average
Stormchaser Mage
7 copies - 3.5 average
Highland Lake
6 copies - 3 average
Tormenting Voice
6 copies - 3 average
Dispel
5 copies - 2.5 average
Jace, Vryn's Prodigy
5 copies - 2.5 average
Lightning Axe
5 copies - 2.5 average
Sphinx's Tutelage
4 copies - 2 average
Bedlam Reveler
4 copies - 2 average
Exquisite Firecraft
3 copies - 1.5 average
Goldnight Castigator
3 copies - 1.5 average
Spell Shrivel
2 copies - 1 average
Psychic Rebuttal
2 copies - 1 average