I made Light sabers in Minecraft. They don't break and they do a lot of damage but to get one, it ain't easy.

RECIPIE:
To craft a light saber you will need a Netherite Ingot, Nether star, A blaze rod, and any one of these supported dyes.

• Purple Dye
• Lime Dye
• Red Dye
• Light Blue Dye
• Yellow Dye

That's Basically it for the datapack. Keep in mind that I have only just started making datapacks so the first few won't be that good.