Tracks specific debuffs on your target. Displays the icon of the debuff with their timers + stacks if they have any.
Tracks:
Curse of the Elements/Ebon Plaguebringer/Earth and Moon (13% magic damage debuff)
ISB/Improved Scorch/Winter's Chill (5% spell crit debuff)
Sunder Armor/Expose Armor/Acid Spit (-20% armor debuff)
Savage Combat/Blood Frenzy (4% physical damage taken debuff)
Misery/Improved Faerie Fire (3% spell hit debuff)
Judgement of Wisdom
Judgement of Light
Heart of the Crusader/Master Poisoner/Totem of Wrath (3% crit debuff)
Curse of Weakness/Sting/Faerie Fire (-5% armor debuff, doesn't stack)
Any taunt debuff
The weakaura only loads for warlocks (can change this in the "Load" tab) and only displays anything if your target is hostile.