End spike



Obsidian Pillars (also known as Obsidian Spikes) are generated structures in The End that are made of Obsidian. Ender Crystals spawn on top of them which heal the Ender Dragon. When these Ender Crystals are destroyed a Bedrock block will spawn on top of the pillars.

History
Instead of destroying it, the Ender Dragon will fly right through an Obsidian Pillar.
 * Obsidian Pillars first appeared in 1.9 Pre-release 4 along with the introduction of The End. When Ender Crystals were introduced in 1.9 Pre-release 6 they were placed on top of the pillars.