There are 6 zones in Azeroth that the invasions can take place. Invasions Rewards - Everything you can obtain by participating in the Demon Invasions event.
I'm going to go over where the invasions take place, the rewards, and more! This guide will cover everything about the Demon Invasions pre-patch event in World of Warcraft including: The Demon Invasions consist of multiple stages in certain areas, and rewards Nethershards to buy event items and chests that can give unique rewards.