Moments earlier.
Alexander was one to dive into unpredictable situations with nothing but his strength and wits. Since he went missing and began grasping his true abilities, his confidence in his comprehension grew to absurd levels.
He had absolute confidence in what he deduced, going as far as killing himself in a simulated trial. Alex did the same thing again, only much bigger with larger stakes.
When he had his enlightenment on how to ascend to godhood, Alex knew he had to give it up. He had to give up everything to become nothing.
It was that realization and acceptance of reality that took away his presence, returning him to a state of nothingness. Alex had the choice to kill himself or let his enemies do it for me.
As he predicted, they panicked and dealt the final blow, killing him in every sense of the word. At the very he, Alex expected to feel something in that moment.
