Aspexia makes a lightning decision confirmed after a moment by Abrogail, and de-invisibles herself.
It's not impossible she could take them all. But it's potentially difficult without Miracle. And they are, arguably, Keltham's passage out from Cheliax, and her own Lord's word also they may not hinder his going to Osirion.
"I am Aspexia Rugatonn, and I speak for Cheliax. Does this army not attempt to take nor harm any thing or person that is Cheliax's by international law, we guarantee the safe passage of Keltham and all who are just now arrived from Osirion, for up to twenty minutes, in that goddess's name."