en 1.11.2 /Command Tutorials

1. First, copy and paste command number 1 into chat.
2. Second, copy and paste command number 2 into a repeating command block and set it off.
3. Third, copy and paste command number 3 into a repeating command block and set it off.
4. Fourth, copy and paste command number 4 into a repeating command block and set it off.

(Do Not Minify Command) 
You're now done!
Just put a Shulker next to a mob and boom the mob will fly away and die.