Sintharia Sintharia , also known as Sinestra or Lady Sinestra , was the former prime consort of Deathwing and mother of Nefarian and Onyxia . She was , until recently , believed dead . Her experiments led to the creation of a flight of twilight dragons which she planned to use to rule Azeroth . Her plans never came to fruition , and her supposed death finally came at the hands of her own creation , the twilight dragon Dargonax . Biography . 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 . 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 . 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 . 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 . In World of Warcraft . Sintharia ' s visit to Outland can be seen in " " . Lady Sinestra is 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 . Cataclysm . After being resurrected by her mate , Sinestra has returned in " " . She will be featured in the Bastion of Twilight , accessible only after completing the final encounter of the instance on Heroic difficulty . Because of her presence in the Bastion of Twilight , it is assumed that she leads in the shadow ' s clan , the Twilight ' s Hammer clan , on behalf of the Black Dragonflight . The presence of eggs shows she watched a brood . During the fight against her , we can see various Twilight Whelp and Twilight drake , this proves she continues the " farming " of Twilight brood for her mate . It seems that she was defeated by heroes helping by Calen until his death . She appears in the raid Bastion of Twilight with several claw marks across her body with burning yellow blood behind them , this is a result of Deathwing attempting to mate with her in his mutilated and burning state , wounds that will never heal or close on their own .