Another Movement Question

[TwoBits]

OK, I'm sure this has been answered before, in one of the numerous old movement-related threads, so I apologize if I'm bringing up old business. I just think it will be easier (for me at least) to ask again and get a quick reply, and then let this thread die off. Thanks in advance for any answers

So here's the situation: The enemy has one of your fortresses under siege, and have broken down your walls. They will certainly storm the fort next turn. You'd like to Cloud Trapeze, Teleport, etc., in some heavy-duty combat mages to defend the place.

Will they appear inside with the defenders, and help foil the enemy attack? Or will they appear outside the fortress during the "magic" phase, and attack the besiegers solo, and thus likely meet a gruesome and pointless demise? Or something else?

Thanks again for any answers!

PS I did check the FAQs, but didn't find any section or other information on Movement. Might it be a good idea to add something about that to the FAQs?