[quote=Saltwater Thief]
I don't think they get anything vs constructs. I mean, if I make my water dragon and have it charge Kotori (sparring, of course), it's the same as if I grabbed a torrent of water and hit her with it. They're immune to magic, but physical objects being controlled by magic are still a problem. You're immune to magic, but Sir Isaac Newton will still kick your teeth in.
[/quote]

That is why I am asking the question too. Lets take the example of the water dragon. In itself, it is, as you said, an physical element being control by magic. So that is fine, nothing really happens. But lets say that the dragon claws a Guardian. The physics of the Guardian being hit still takes place, but the construct came into contact WITH the guardian which is immune to magic... So would part of the claws fall to the ground like normal water as the magic can't be sustained?

I know it sounds really idiotic, but I have to ask xD

Edit: For the wall of stone, it is easy. They don't need magic to sustain it, just to create it, so the walls wouldn't be magic AFTER the creation.