Here we have the fabled sword of King Arthur, compiled into a ‘Resource Pack’ for Minecraft (Java Edition) 1.14 - 1.19.2 (adjust pack_format number as needed)

This pack contains 1 model, implemented using custom data as to not override any of Minecrafts existing features. The sword uses the base stats of the diamond sword, but can easily be changed to suit your needs (manual included).

(Summon Command included)

Designed by Vahlgoul and created with Blockbench.