This is a wall mount for the Master Sword from: https://www.printables.com/model/252630-legend-of-zelda-master-sword-botw-totk-full-scale
Print it flat to get the strongest mount. It is just long enough to have some space between the wall and hilt guard. I designed it by importing the guard into fusion and tracing around it so it's a good fit.
The author marked this model as their own original creation.