Well, I don't now what this is used for, :D
Note: Minify the command to avoid issues :)
INVINCIBILITY SWORD
My head...
I present to you, Potion of Levitation!!
Mark 1: Iron Man's Helmet in Vanilla Minecraft
go 1000mph with a walking stick
TnT
Get cool minecraft banners in ONE COMMAND NO MODS!
Herobrine's Flesh