This is a glitched weapon. It's a Strange weapon but shows as being Unique quality. These were part of a halloween glitch a few years back where any item you unboxed was like this. 1 of 3 item.
1,000 Keys Pure.
Tradable (160) or Giftwrapped (100). (You can no longer Giftwrap this item. It needs to already be wrapped from years ago when you still could. Willing to negotiate.
Gifted by Notch creator of Minecraft.