Double-edged sword
Two Schneidig are swords called, which are ground on both sides. As a result, the fighter had several attack options available: strong punches and cuts with the forehand and backhand punches that could hit shields and parapets , but were weaker. In addition, it was possible for the fighter to simply turn a blunt blade in the fight in order to be able to continue fighting.
The phrase “two-edged sword” already appears in the Bible:
"For the word of God is alive and strong and sharper than any two-edged sword and penetrates until it separates soul and spirit, also marrow and bone, and is a judge of the thoughts and senses of the heart."
The term originally positive, viewed as a quality feature, changed to the later ambivalent usage, in which "a double-edged sword" is something that can be both beneficial and disadvantageous in some way.