In a world plagued by monsters, you are the chosen one wielder of the Sun-Slicer, a weapon rumored to destroy all evil. However, when you draw the blade for the first time in battle, it passes harmlessly through your enemies. Instead, the sword glows and heals the wounds of anyone it touches. Describe how you must use this 'weapon' to win a war without violence, focusing on a climactic battle scene where defense is the only offense.