Summons a sword 2 blocks above the command block. The sword is supposed to kill anything in one hit, but if it doesn't (which isn't supposed to happne) just finish off the mob with the Potion of Torture (without the Regeneration for a faster kill). The sword is supposed to break in one hit, but if it doesn't you can: either tell me how to do so, or just change the command for Unbreaking.