http://www.mmo-champion.com/threads/...ampening+field
Mogu'shan Vaults: Dampening FieldCutting Edge Achievements
One of the blue posts tonight mentioned the new Cutting Edge achievements, which are awarded from doing an encounter without a debuff similar to the on active in Dragon Soul. These will be unavailable after a new tier of raids is introduced, and new achievements for the new raid tier will be added.
Heart of Fear: Klaxxi Resonance
Terrace of Endless Spring: Ritual of Purification