I’ll just link a post of mine in the headcanon thread, where I try to explain how all elves are dependant on magic, with a focus on Night Elves and High Elves.
I’ll post my full theory on this, since I’ve had it lying around for a while now.
Night Elves evolved from Trolls (Chronicles said it was over generations) through the magic of the Well of Eternity. When they had reached the ‘highest’ form possible (high intelligence, virtual immortal etc.) the Well maintained their form. After the Well of Eternity was destroyed, the Night Elves probably would have grown sick if not for the Second Well of Eternity on top of Mount Hyjal. The Second Well, being …