The Ender Dragon is a boss mob that appears in The End. This mobs is Humanistic version of the Ender Dragon mob found in The End.
The ender dragon only spawns in the End. It does not have a spawn egg, and thus can be spawned only through commands or natural generation. As of 1.9,[upcoming] you can respawn the dragon by placing four ender crystals atop the exit portal, one on each side.
Once killed, the ender dragon will appear to have beams of light spontaneously erupting from its body. It will then explode, dropping enough experience to bring a player from no experience to level 78 (12000 – 10 drops of 1000 experience, one drop of 2000 experience). It will also spawn an exit portal with a dragon egg on top. This portal appears at Y=64 at the X and Z location where the dragon died.