this command allows a user to spawn gear as powerful as Minecraft will allow without modding

1.press t then type /give @p minecraft:command_block 1

2.place the command block in your world with right click

3.right click on the command block and copy-paste the following command into it

4.power it with a button or Redstone block

now works from 1.8 to 1.14.x

Here is a link to my command https://pastebin.com/4QRvSKK2 enjoy the command!

PS: if you click on the link and the page it takes you to is outdated please tell me in the comments and I will make a new link