The Nightborne are a race of evolved night elves native to Suramar. Originally night elves themselves, once Suramar City was surrounded by a barrier in order to protect it during the Great Sundering, all moonlight was blocked off, and the power of the Nightwell, a font of arcane energy, changed them into the Shal'dorei. Due to being exposed to the Nightwell's power, they had a great lust for mana, and too much time without it would devolve them into Nightfallen, and even further into Withered, where they would have no hope of returning to their old Nightborne selves, and lost their minds. During the Burning Legion's third invasion of Azeroth, Grand Magistrix Elisande pledged Suramar to the Legion. Through a resistance led by First Arcanist Thalyssra, Suramar was eventually liberated. After the final defeat of the Legion on Argus, the Nightborne joined the Horde.