This is a command which fabricates an unbreakable Elytra with many overpowered properties all of which are of maximum power. Among them are armour and armour toughness which from my testing provide invincibility to all hit damage, Attack damage and speed which allow fast killing of anything in the game, knockback resistance which prevents all knockback obviously, luck which provides better loot in chests, enchantments such as all protections to prevent other forms of damage. I may add health and speed attributs in the future but I have left them out for they may be annoying as high health levels would fill the screen.

Command link:
https://pastebin.com/TbZynkGv

The command is so large that it requires a command block which can be created with the command /give @s minecraft:command_block 1

Please give feedback if you can suggest any improvements :)