Hello - we're in certain campaign at the point where we must go into different plane and it seems there will be quite powerful creatures which can cast dismissal on us. Does anyone have an idea how we could prevent them from casting / counter it with something else? Dimensional anchor seemed bit vague on the matter... Should I just try to craft some strange magical item against it or is there actually something in the system itself designed to prevent dismissal?
If it's a specific spell you're worried about, Ring of Counterspells works well. It gets a bit trickier if you might have to deal with multiple different spells.