A basic revival spell. The most simple I can think of to start with. It will help if his soul and mind is there, it may be just a matter of reintegrating it with his body... he has life of a sort and seems to be aware on a basic level.

[Grainne spoke softly, almost as if she were speaking to herself, following Emilia almost automatically.]

If it works, it will seek to bring everything back into focus and fit together again. Such magic is very difficult though, even a simple one. I will lay out all of the steps before we start.