Plays a sound and displays an icon of a class cooldown (if available and ready) or a Healthstone icon to remind people to press something on low HP when they get the Penetrating Cold debuff during Anub P3 (30%).
Currently tracked CDs (higher priority than Healthstone)
Paladin - Bubble
Rogue - Cloak of Shadows
DK - Anti-Magic Shell
Mage - Ice Block
Druid - Barkskin
DPriest - Desperate Prayer
Lower priority than Healthstone:
Warrior - Enraged Regeneration
SPriest - Dispersion