End Crystal

The Ender Crystal is a new entity that exists in 1.9 Pre-release 6, it has a bedrock-type base with multiple spinning crystals within it. It sits on top of a bedrock block on top of all the obsidian pillars in The End. As the enderdragon flies by them, they establish a strange "static beam" that heals the enderdragon. Unfortunately the enderdragon never ventures far from these crystals, which makes it almost impossible to kill it with them active. In order to destroy one, you need to either shoot it with an arrow, or climb to the top of the pillar and manually destroy it. Unfortunately the Crystal will explode on it's destruction, so hitting it with an arrow is preferable. Once all of the Ender Crystals are destroyed, the enderdragon can be defeated, albeit with 200 hit points it will be difficult.