The Void elves are one of the playable Alliance allied races, introduced at the end of Legion expansion. In order to unlock them you will need to complete “You are now Prepared!” achievement. This service is designed to do exactly that.
ETA for the service is – 6 hours.
Void elves unlock rewards:
- Void elves playable race unlock
- “Allied Races: Void elves” and “You are now Prepared!” achievements
- Starcursed Voidstrider mount