THIS MOD HAS BEEN REBOOTED!!!
I have remade this mod in the newer versions of Minecraft. You can find that project here:
https://minecraft.curseforge.com/projects/the-last-sword-you-will-ever-need-reboot
Files of this mod are a legacy version. Any updates will be on the reboot page.
The Last Sword You Will Ever Need Mod adds as it says the last sword you will ever need. It is a sword that can one hit KO the Ender Dragon.