Mal'Ganis and Kin'tessa assault players with a combination of decay and shadow magic.
When Mal'Ganis reaches 100 energy, he signals both dreadlords to dissolve into their swarm forms and inflict high damage to all players with [Swarm of Decay]
and [Swarm of Shadows]
When Kin'tessa reaches 100 energy, she signals both dreadlords to vanish and infiltrate the raid, deceiving their minds with [Infiltration of Dread]
Upon death, each of the dreadlords turns into a [Rampaging Swarm]
until the other is destroyed as well.