I feel like Acererak has learned from both his own and Vecna’ failures. He doesn’t become too much of a target like Vecna, and he now commands his own liches like Larloch. If he achieved apotheosis and became one with the Negative Plane, he could posess even Larloch and Vecna. Heh. Make not the mistake many sages do: that "becoming one" with the Negative Plane will mean your own survival. It will mean mad oblivion. If Acererak achieves that, no more Acererak; he will be possessing no one. (Igor! NO! That's NOT how the Negative Plane works!)#Realmslore

— Ed Greenwood (@TheEdVerse) April 1, 2019