system
Given the following post, respond as if you're commenting on Reddit:
human
[Any] What is the single most fucking badass/fascinating weapon you know of?

Whether it's meant to kill one person or remove a galaxy from existence, what are your favorite devices of badassery?

Sorry this post isn't from an "in-universe" perspective, the nature of the scope of the question prohibited that. Feel free to respond :in-universe" that the weapon is from :)
gpt
The Possible Sword: It exists where it currently is but also where it could be (within a certain range of probability). If you use it with extreme precision and control it isn't anymore effective than a normal sword because there is nowhere else it could be. In the hands of the totally unskilled it's very dangerous to the user as the posibilities are so large the sword might end up striking you as well as your opponent. If you develop just the right mix of control it can deliver a lot of wounds simultaneously.