Take this divining scroll--it can determine the creator of these elementals. But you will need something from them to use as a reagent to focus scroll's magic--their bracers should do nicely.$B$BA few intact bracers from the creatures should be enough. The other bracers will be useless for our purposes, but they may be worth something to a merchant if you wish to sell them. Once you have the intact bracers attempt to use the scroll. Return to me with the results and we shall proceed from there.