Presumably, whatever destroyed Gaia had already moved on and hasn't reached the tower. Or they have some kind of defense against it. They can already bring the dead back to life so that already evidence towards them having more advanced technology than most worlds represented here.

[She's heard worse. Ever heard Veld give them a speech on what their mission will entail? Yeesh.]

Start considering the supernatural. You've got people here who can change shape and summon the elements.