how to get OP items:
paste this into the chat for a command block:
/give @s command_block
(make sure your in creative or you cant place this down)

then, place down the command block and paste in the command for an overpowered diamond sword. (Java edition)

Command:

OP Sword - Pastebin.com


switch -minecraft:wooden_sword- with any type of weapon(doesnt have to be a weapon), and it'll still work.

minecraft:diamond_block
minecraft:wooden_sword
minecraft:netherite_axe
minecraft:golden_hoe
minecraft:dirt