*gets a magician to cause an earthquake to reverse the flow of the river so it floods the DWARVES camp with custard* (note it was a harmless earthquake to both sides, though there may be some colapses in the surrounding land)
An ultrasonic signal, audible only to animals, sets off a trained response in the puppies taken from the Dwarf camp. All of the puppies immediately begin chewing up furniture and shoes belonging to Elves.