No Ehlissa.
You’re putting the cart before the horse.
The lore has materially changed. It has been retcon’d.
And furthermore, all warlocks use shadow. Canonically, the Council of the Black Harvest learned new magic (Affliction) from the Twilight’s Hammer (Old Gods).
They retcon’d the Twisting Nether to not use void, but also warlocks are “any magic user breaking the rules and using dark and dangerous magic”
The Council of the Black Harvest has canonically adopted magic from:
- Twilight’s Hammer and Old Gods
- Deathwing
- Ragnaros/the Elemental Plane of Fire
- Illidan
- The Burning Legion
- Azerothian Blood Magic (Specifically Blood Stones, which has ties to Old Gods)
- Necrolytes (Necromancy) wielding a Dreadlord Scythe (Necromancy)
- and more
Which is all listed in my thread 