[quote=@Raijinslayer]
[@Prince of Seraphs]Nope, only Holy magic could nullify it and Sun magic isn't the same in my book. Not in the way you have it, at least.
[/quote]

Not nullify it, repel it. Sun magic, at least at the level Dawn is currently capable of wielding it is essentially extreme heat and light which is the opposite of the environment flesh would rot in best (cold and damp). I'm not saying that Sol magic would cancel out yours but it would be fairly effective against it.