I'm up for discussing this idea in general, but for starters, I have this one that came up:
One of the players in one of my games asked about the concept of "combining" elements together to create things such as cold fire or flames of shadow.
Personally, I'm looking at just making it count as whatever element is should act like (in this case, fire) but just have the narrative flavor. The only thought against this involves two events from the books: when Harry burns and freezes Red Court Vampires near the end of Changes, and in Cold Days when he
unleashes the icy fire blast at He Who Walks Before in Mac's
, which makes me wonder if there is a mechanical way/benefit to mixing two elements together in a spell.
Anyone have any thought to this idea, or have their own similar situation they need to soundboard?