“Let us exchange,” said the old man to the Cossack. “I will give you a sword, and you give me the keg: what is the use of the keg to you? This is a sword which slays of itself: you need only wave it, and however incalculable the force may be it will slay them all in front of it. You see that forest? Shall I show you what it can do?” Then the old man drew his sword and said to it, “Set to work, self-slaying sword, and despoil all the dreamy forest.” So the sword flew out of his hands, cut down the trees, and laid them all down in regular boards. Then, after it had cut them down, it came back to its master.

So the Cossack did not long bethink him, but gave the old man his keg and took the self-slaying sword, waved the sword, and killed the old man. Then he tied the keg to his saddle, mounted his horse, and thought he would go back to the King. But just then a terrible enemy was besieging the capital city of that King, and the Cossack saw an incalculable host and array, waved his sword and said, “Self-slaying sword, serve me a service and spill the hostile host.” And then there was a fine sight⁠—heads flying about, blood flowing freely⁠—and within one hour all the field was covered with corpses.