"He's only omnipotent here - "

Which does mean, logistically, that working with him instead of against him is the likeliest option.

Zerxus...takes a deep breath, and then keeps eating, because he needs something to ground him for a bit.

Only once he's almost finished does he say, slow and quiet, "You think he brought you here - for me?"

Mostly, he still sounds stunned and uncertain, but there's a growing edge to his voice.