Minecraft wiki entry for Things_to_do_when_bored, associated text: Command for an overpowered Diamond Sword:
/give @s diamond_sword{display:{Name:"\"OP sword!\""},Enchantments:[{id:sharpness,lvl:32767},{id:knockback,lvl:10},{id:fire_aspect,lvl:32767},{id:looting,lvl:10},{id:sweeping,lvl:32767},{id:mending,lvl:32767}]}