Blackwing Descent

Blackwing Descent is an entry-level level 85 raid instance. Having retreated further into Blackrock Mountain following his defeat in Blackwing Lair, Nefarian has been bolstering his forces here and must be stopped once more. The entrance to the instance is near Nefarian's throne in the uninstanced portion of Blackwing Lair and is accessible by flying mount only.

Blackwing Descent, along with Bastion of Twilight and Throne of the Four Winds, is one of the first raid instances in World of Warcraft: Cataclysm and its place in the expansion is intended to be akin to that of Naxxramas in Wrath of the Lich King.

Dungeon Journal
''Nefarian and his warped attempts to create a new breed of dragon were thought to be defeated after his death in Blackwing Lair. Yet tales have emerged that his father, Deathwing, has reanimated Nefarian and set him to work in Blackwing Descent. The gruesome experiments being conducted there are feared to be on a level of wickedness far surpassing Nefarian's previous crimes against nature.''

History
Dwelling on the lessons learned from his defeat in Blackwing Lair, he has burrowed deeper into the heart of Blackrock Mountain, and rebuilt his sanctuary. The Vault of the Shadowflame, a deep pit of cascading magma, is the heart of Blackwing Descent, and the location of horrific new experiments in undeath and magical augmentation, including a triumph dear to even Nefarian's cold, wrathful heart. Only death awaits those fools who would assume that the Lord of Blackrock will be easily defeated a second time.

During their campaign against the Twilight's Hammer cult, the Alliance and Horde vanquished Nefarian.

During the events of Black Empire Campaign, Wrathion's agent stood watch over the cave, but was killed by the Darkwhisper cultists led by Dark Inquisitor Xanesh who infiltrated the area. Wrathion and an adventurer entered the area and fought against the sect, N'Zoth's servants, and corrupted experiments, while noticing several twilight drakes and more importantly, hoping to secure an object of pure corruption for the Black Prince. Once the enemies were defeated and the halls investigated, Wrathion destroyed the remains of Nefarian and Onyxia, and took their scales to use as protection.

Intro on walking beyond entrance

 * Normal
 * yell


 * Heroic
 * yell

Geography
The instance consists of two subzones, the Broken Hall and the Vault of the Shadowflame. When you enter the instance, the Omnotron Defense System will be off to your right with Magmaw off to your left. There is no required order, but Magmaw is usually considered the "first" boss. You next descend into the Vault, where Nefarian's experiments take place.

The Vault branches off into three areas where Chimaeron, Atramedes and Maloriak can be found. Only after defeating all of them will Nefarian himself become available, standing in the middle of the Vault as Lord Victor Nefarius.

Achievements

 * Blackwing Descent (achievement)
 * Blackwing Descent Guild Run
 * Heroic: Omnotron Defense System
 * Heroic: Atramedes
 * Heroic: Chimaeron
 * Heroic: Magmaw
 * Heroic: Maloriak
 * Heroic: Nefarian
 * Heroic: Nefarian Guild Run
 * Realm First! Nefarian
 * Keeping it in the Family
 * Parasite Evening
 * Silence is Golden
 * Aberrant Behavior
 * Achieve-a-tron
 * Full of Sound and Fury