It is both. The Legion event of Vol'jin's death might be a proof that the Loa of death allowed him to die this time around not unlike in the scenario in MoP.
Who were they? What are their names and aside from Queen Azshara why aren't they venerated as much as her or why aren't there any statues erected for them in anywhere the Night Elven civilization could be?It has been suggested that there were rulers before Azshara, so I'm not sure why you'd think she would know this stuff.
Now I believe that the experimentation with the Wild Gods and Trolls must have been the half-humanoid species such as Dryads, Centaurs and Keeper of the Groves. Basically Druidism is a strong link that is shared by Troll and Kaldorei ancestry. This could possibly what can we find inside the Raid of Uldir.Alternatively other legends imply that Night Elves descended from the offspring of Elune, she herself appearing to be Night Elf in form. By this legend, it would explain how Night Elves share such similar physical appearance with Dryads, and Keepers of the Grove.
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I don't want to be rude like you but kindly review the basic skill of reading and comprehension. But thanks for your effort and supplying the needed material, allow me to even disprove your claim even more.
"Around this time, they had become completely severed from the life-giving energy of the Well of Eternity. This meant that they were vulnerable to the elements and had not received immortality from Nozdormu and the World Tree. They had shrunk in height and their skin had become a peach hue similar to most dwarves and humans. "
to your "Incorrect. The high elves' pale skin came LONG before the Sunwell." Your quote was part of a longer paragraph under the title Founding of Quel'thalas.