Just as the standoff is about to become a shootout, the air around Alcar, Elone, and Ubaar becomes full of bone-numbing frozen mist, and a sheet of ice covers the grouns. No one can see, and movement is difficult. They can hear the goblins and worgs riding away, though.
(at last count, there were two worgs and four goblins, with three other goblins possibly at large.)