Serinar

Serinar is a black dragon located in the Maw of Neltharion in Dragonblight. A Burning Depths Necrolyte lies dead on the ground to his side. He has apparently played a part in destroying entire civilizations, and refers to the player as an "effective tool." Adventurers are sent to aid him in defending the Obsidian Dragonshrine. For a member of the black dragonflight he is rather friendly, expressing gratitude towards the player after they have succeeded in protecting the shrine. He is fighting against the Cult of the Damned.

Quests

 * The Obsidian Dragonshrine
 * No Place to Run
 * No One to Save You
 * The Best of Intentions
 * Defiling the Defilers
 * Culling the Damned
 * Neltharion's Flame (quest)
 * Tales of Destruction

Quotes
I've played my part in destroying entire civilizations... to have to lower myself to dealing with the wretched Cult of the Damned disgusts me.
 * Gossip

Status
After the death of Deathwing, Wrathion says that to his knowledge he is the only black dragon remaining. This could mean Serinar was killed at an unknown point in the war against Deathwing. Alternatively, he may have been able to evade Wrathion's detection. Another possibility is that Serinar is no longer on Azeroth, perhaps having gone to Outland to join Sabellian.