Ymirjar Deathbringer can be found in the Pit of Saron in Icecrown Citadel on the path leading to Scourgelord's Command. She summons in two Ymirjar Flamebearers and two Ymirjar Wrathbringers. Her summon ability in Icecrown Citadel raid can be interrupted, making her relatively harmless as long as one person makes sure it she can't cast.