This all happened during the Burning Crusade time period.ĭuring this same time period and a little while after IIRC, the elves who would become the void elves were a group of scholarly-minded individuals who wished to study void magic, but were shunned or cast out by the rest of Sin’dorei society.
Those that survived the initial demon-ritual process were then trained by Illidan en masse to become an elite demon-killing-machine army as quickly as possible. The blood elves who became Illidari were handpicked fighters from Kael’thas’ Sunfury legion in Outland.
The simple reason is that it’s canonic history at this point. How so? A genuine question as I am not exactly lore buff
