Gimme sword ideas pls

Hello! I am making a mod that adds some magic swords to the game! My mod is currently in Alpha Stages and I have run out of ideas. Can someone please give me a sword with some abilities (abilities are not required).

It will be best if the sword was made from something already in-game, the swords can be OP, but if you have an idea for an OP sword then it must be really hard to get.

I have already made those swords so do not suggest them: Slime Sword, Iron Slime Sword, (Red) Sandstone Sword, Molten Iron Sword, Beacon Sword, Emerald Sword, Redstone Sword, Lapis Sword, Steak Sword, Aurora Sword (Works like the totem of undying kinda), Coal Sword, (Strong) Glass (Lava, water) Sword.

Thanks

--Sliwka--