To kill Destroyer:
/kill @e[name=Destroyer]
Note: Minify the command to avoid issues :)
PVP KIT!!!!!!
PVP Leggings
"Click Here to live."
TheZombieKing
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)