This command you can spawn The Queen with no mods.
Note: Minify the command to avoid issues :)
The head of the Get away horse
Spawn in Stampy no mods!!!
Minecraft 1.9 Features only one command
/spawnboss
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)