Teleporting mobs to you by evildoortracker

Put this in a repeating block or redstone repeating clock

Constantly teleport mobs to someone

(Summon some Guardians, then use the command, and finally go to gamemode 3, LEAD YOU ARMY OF GUARDIANS) 

(Please give the infinite resistance so they don't die)

(You can kill them after using /kill @e[type=Guardian] or whatever mob you choose)