This is a datapack that bans diamonds and netherite, along with its respective armour pieces and enchantments. If you try use any of these, you will be killed within seconds!

I recommend unzipping the file and just putting the folder in for optimal use.

How to use:
Load a new world on any version from Minecraft 1.18 - 1.18.2 with the datapack enabled and cheats on
Type /function oparmourban:start to ban everything.
Type /function oparmourban:stop to stop the datapack. However, upon doing this you will need to reenable the datapack using /datapack enable.
If you want to ban only one specific thing in the pack, type /function oparmourban:{function}
If you put on diamond or netherite armour, then effect clouds will spawn near you which damage you at a rate of 6 hearts per second. If you have the advancements "Diamonds!", "Hidden In The Depths" or "Enchanter" then you will take 6 hearts of damage every second.

Please report any bugs in the datapack in the comments, I'll try to fix them as soon as I can with new updates :)