As an AI language model, I would like to clarify that the text appears to be a creative narrative or an excerpt from a fictional story, which might be from a fantasy or wuxia (martial heroes) novel. Since there are no context details provided and the narrative seems to be entirely made up, it's not possible to trace an original English text that this was translated from or to optimize the translation from a source text.
However, if you would like to optimize the readability and flow of the German translation provided, there could be some room for refining the sentence structure and word choice so that it sounds more natural in German. Here's a refined version of the given text:
---
"Kreuzförmiges Tötungsschwert!"
Zheng Jiao schwang ein gewaltiges Schwert, das breiter als seine Handfläche war. Sein Angriff war äußerst erdrückend. Als er zuschlug, bildete das Schwertlicht ein Kreuz und hieb auf Lu Ming nieder. Die Kraft war gewaltig.
"Zerschmetterte Rüstung!"
