WOW Insider

In addition, Mage Guards are what make the sparkly pink bubbles you see throughout the instance. Anything inside the field will receive 75% reduced effect from both healing and damaging magic spells cast upon them, so it is paramount to make sure both the mobs being DPSed and the tank stay outside the bubble. In theory it might help to keep your healer and ranged DPSers inside the bubble, to reduce the amount of AoE damage they take (there's a fair bit of AoE in MrT), but on the other hand, they'd need to remember to move out of the bubble when they wanted heals. Probably best to just avoid them altogether, like almost any other highlighted area in this game (Flame Wreath, anyone?).

screenshot via Wowhead

28/03/08