Heheh. I was having some thoughts. I think that the event that binds these two together should happen at the pond. Since magics are going to be taking place, and they will both be there, I can see maybe an interruption by the locals, either hostile or non hostile.

Also, I think the idea of his magic flexing when he's upset, I was kinda thinking the same thing, but for the sake of the dog's responses I'm thinking more of a chemical response. In other words, he lets of some sort of scent that marks him as hostile when he's upset. 

I was also thinking, that maybe at some point in the future, Either the nice old lady or Chall himself (Or both) could explain how magic is just a natural part of Chall. Wren's way of seeing magic as unnatural sounds like something fun for Chall to deal with eventually :P

Yeah, just some thoughts. I may not get to my response tonight, in fact I'm sure of it, HOWEVER! I am sure I will get it up tomorrow! So, look forward to it :P