I was thinking it wouldn't be too harmful for a new spell or concept for invokers to be able to do. If they can control the elements so well, and change their surroundings with various spells, should they not be able to counteract those surroundings magics, or cancel them rather?

So some sort of magical cancellation of things like gel or quicksand, or conglication is what I had in mind. Perhaps to limit its usefulness only to be learned for each particarly path? After you master your spells in that path to a certain point.

Any other ideas on this matter?