Stop bringing this argument up before I have an aneurysm. You're arguing against Kosak and Metzen, for Christssake.
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...it's stated in Chronicles that
literally ripping the Old Gods out of Azeroth like Aman'thul would destroy Azeroth. That is not what we did to C'thun and Yogg.
Plus, again, Metzen literally said at BlizzCon a few years ago that the deaths of C'thun and Yogg are a major reason the Cataclysm happened.
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No, not Thel'zan. Father Inigo Montoy of the Argent Dawn, a double agent for the Scourge.
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The Skull of Gul'dan.
THE SKULL OF GUL'DAN.
Physical death does not prevent communication in Warcraft.