It's somewhere on youtube and someone had a thread on it here at some point. Khadgar is the one explaining it all.
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Most of that is head canon. Please stop. Nzoth is one of the weakest old gods and wasn't even the mastermind behind the head canon people had prior to chronicle. Sargeras doesn't want his avatar from Azeroth because it was made PURPOSEFULLY weak so that Aegwynn could kill it and allow him to infect her. People really need to stop ranting about the original avatar as it is not a threat.