ick! Earthquake

[Micah]

That'll work against the pretender, yes, but Agartha has plenty of mages that can cast earthquake, so it's not a solution.

Defense gives a save against earthquake though, so the Eponi knights should hold up alright, especially since high defense works well against Agartha anyhow. You can try to script twist fate for your druids, although that won't help if the earthquake goes off first turn when you attack, so if you can get him to attack you and then cast twist if he's not multi-casting it you should be ok.