Annie flew through the sky like a bolt of lightning, even after that battle her esper pool had barely dropped.
To be fair that could be barely be considered a fight, she had trapped him in an illusion the first time he attacked.
Everything that happened after was an illusion she constructed, even his own weapons were an illusion.
As for how she knew about them and their effects, she took that knowledge from his mind.
When he figured out he was in an illusion he wanted to use the Eye of Osiris and he thought about.
So she constructed it, when he wanted to use the plasma cannon, he thought about it as well, she constructed it.
To be fair, even if he did use the real Eye of Osiris, he had no chance of escaping from her illusion.
She flew across the entire continent to a port town, the moment she got there she caught a strong scent of death.
The entire town had turned into a graveyard with corpses littering the street, all having died gruesomely.
