|Race||Nether dragon (Dragonkin)|
|Position||Prince of the Netherwing Dragonflight|
|Relative(s)||Karynaku (mother), Neltharaku (father), Zoya, Onyxien (sisters), Deathwing (grandfather), Sinestra (grandmother); Nefarian, Sabellian, Dargonax, Wrathion (uncles), Onyxia (aunt)|
Mordenai (true name: Mordenaku) is a nether dragon quest giver located at Netherwing Fields in Shadowmoon Valley. He wears the guise of a high elf, and approaches adventurers with a plea for aid to save his people from the Dragonmaw orcs. He is the son of Karynaku and Neltharaku, Netherwing's matriarch and patriarch, respectively.
He starts the following quests:
"Mother!" — Yelled when Karynaku approaches him.