Sintharia

Sintharia, also known as Sinestra or Lady Sinestra, was the former prime consort of Deathwing and mother of Nefarian and Onyxia. Until recently, she was believed dead. Her experiments led to the creation of the Twilight Dragonflight, through which she planned to rule Azeroth. Her plans never came to fruition, and it was believed she was killed by her own creation, the twilight dragon Dargonax. However, recent events have indicated that she survived.

Early history
Sintharia was once the prime consort of Neltharion, who later came to be known as. She gave birth to some of Deathwing's most despicable children including and his sister,. After Neltharion's madness overtook him and the rest of the black dragonflight, the newly disfigured Deathwing attempted to mate with his consorts, causing Sintharia a great deal of pain and leaving behind scars and burn marks. Sintharia was the only mate known to have survived.

Approximately five hundred years prior to the opening of the Dark Portal, Sintharia attempted to bring down the Kirin Tor with a curse that left the wizards unable to use their magic. Her scheme was foiled in part by Korialstrasz, consort to Alexstrasza, and when Sintharia was defeated, most believed her to be dead. She survived, however, and forsook her mate and children, taking on the guise of Lady Sinestra, a name she came to use as a dragon as well.

Burning Crusade


After the disappearance of Deathwing and the deaths of Nefarian and Onyxia, Sinestra reemerged hoping to continue her family's plan of creating a superior dragonflight to rule over Azeroth. So Sintharia traveled to Outland and made a deal with the orcs - trading the services of the black flight for netherwing eggs, and letting it slip that 'her master' could use them.

Sintharia's visit to Outland can be seen in World of Warcraft: The Burning Crusade, in which Lady Sinestra appears as a level 73 NPC located at the Dragonmaw Base Camp in the contested territory of Shadowmoon Valley. She uses her blood elven guise for her meeting with Overlord Mor'ghor, presenting herself as an emissary of the black dragonflight.

Night of the Dragon
Gathering up what shards of the Demon Soul she could find and Balacgos's Bane, Sinestra used these relics, along with the eggs of various flights she had collected over the centuries and the captured nether dragon Zzeraku, to create the twilight dragonflight. Despite Sinestra's claim that the experiment had been her idea, it was revealed that Deathwing had planted the idea in her mind, just as the Old Gods had convinced Deathwing to forge the Demon Soul. One of the first of these new twilight dragons was Dargonax, whom she considered to be her child.

Her old nemesis Korialstrasz, along with others such as Zzeraku, the blue dragon Kalecgos, the wizard Rhonin, Vereesa Windrunner, and the draenei priestess Iridi, put a stop to her operation. When Dargonax's already unstable powers finally destabilized, he burned away, taking his "mother" with him. Korialstrasz believed that Sintharia's last, angered glance may have been at him.

Cataclysm


Despite her apparent demise in Night of the Dragon, Sinestra has returned in World of Warcraft: Cataclysm. Now a ravaged husk of her former self, pieced together and reanimated by the powers of Deathwing's Old God master, Sinestra oversees the creation of new twilight clutches. She is the 'true' final boss encounter in the Bastion of Twilight in Grim Batol, accessible only after beating on Heroic difficulty. It is revealed that she's giving birth to a clutch of black dragon eggs that are to be turned into twilight dragon eggs. Calen also appears in his night elf guise during the Sinestra encounter. Sinestra siphons all the life energy from her eggs and shoots that energy at Calen. He dies and gives his power to the raid, giving them a buff which is enough strength to defeat Sinestra.

Interestingly, the fight ends when Sinestra is reduced to 1 million HP, where she will get sucked back into her pool of lava. This gives way to speculation as to whether she survived the encounter or not.

Personality
Sintharia had the unfortunate experience of surviving mating with Deathwing - a creature largely composed of molten lava. The experience left her with half of her face literally melted away, and the scars on her face and body continued to burn, thousands of years later - more than enough to drive Sintharia completely insane. Besides that, there were voices speaking to her while she slept that assured her creating a new dragonflight was a very good idea.

Trivia

 * Her armor during her Shadowmoon Valley appearance is the Gronnstalker's Armor, the hunter tier 6 set.
 * Her Shadowmoon Valley dragon form uses Onyxia's model.
 * Her Bastion of Twilight model uses the same animations as Kil'Jaeden.

Night of the Dragon

 * "You could not imagine the agony of those times, the burning, the constant burning... It still burns...."


 * "You will refer to me as Sinestra, not Sintharia! I have shaken off that foul past! No new black flight will rule Azeroth! The black flight is dead, and no one shall mourn it less than me, Korialstrasz! There is nothing of it which I cherish, least of all my unlamented lord's memory or our ill-begotten children! They are all anathema to me — Onyxia, Nefarian, or any else who have managed to survive his foolish plans! Why should I care of the black flight...when I can birth into this world a far more worthy flight, a new breed of dragons who truly will become gods"


 * "No! This is my dream! My grand vision! Yes, I will make over Azeroth into a realm ruled by the ultimate dragonflight, but it will be my creation, nothing of his! Mine!"

Meeting with Overlord Mor'ghor

 * Lady Sinestra, in dragon form, lands and then transforms into her elf form. Two Dragonmaw Enforcers step forward to block her.
 * say
 * say
 * say
 * emote
 * say
 * say
 * say
 * say
 * say
 * emote
 * say
 * emote
 * say
 * say

Bastion of Twilight

 * yell (last words)