The Aura glows when you can interrupt.
This is a collection of 15 auras:
DK Mind Freeze (icon)
DK Mind Freeze Glow (icon)
DK Mind Freeze CD (icon)
Shaman Wind Shear (icon)
Shaman Wind Shear Glow (icon)
Shaman Wind Shear CD (icon)
Paladin Rebuke (icon)
Paladin Rebuke Glow (icon)
Paladin Rebuke CD (icon)
Rogue Kick (icon)
Rogue Kick Glow (icon)
Rogue Kick CD (icon)
DH Consume Magic (icon)
DH Consume Magic Glow (icon)
DH Consume Magic CD (icon)