[atul]

Originally posted by Taqwus:
Domes will work against all spells including those of the owner.

Excluding at least (this I've tested) site scrying spells such as augury, maybe (fargone conclusion from too small experiment) even all spells that must target 'friendly province'. I've never tested, but since Gateway works only to friendly labs, maybe you could use it to move troops in domed provinces even if you can't Teleport or Cloud Trapeze (can target any province so domes block 'em) there?

And, the domes don't stop spells originating and targeting same province, so if your enemy is sieging your domed castle and you have lots of mages inside, fire freely. (I know I have)

Usually casters don't harm their own troops outside battle, but Wind Ride targets your own first. Dunno about the third party involvement.