heres the right way to summon these things!
Note: Minify the command to avoid issues :)
summon xp orb!!!!!!!!!
mettaton EX pack part 3
upgraded wither its good if you have an urge to slay more mobs!
OP piston head!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)