n End Crystal is a special entity found on the End's main island, primarily used to heal the Ender Dragon. It naturally generates atop the obsidian pillars, with two protected by iron bar cages. Players can craft it using Glass, an Eye of Ender, and a Ghast Tear. It can only be placed on Obsidian or Bedrock and creates fire at its location upon placement.
End Crystals are crucial for respawning the Ender Dragon by placing four around the End exit portal. However, they are highly volatile and explode instantly when damaged. Their explosion has a strength equal to a Charged Creeper's blast, making them dangerous but useful in traps or combat scenarios. Unlike most explosions, End Crystal blasts do not destroy blocks beneath them if placed on Obsidian or Bedrock.
When near the Ender Dragon, an End Crystal emits a beam to heal it. This beam can be manually modified using commands to point at specific coordinates. End Crystals are intangible, allowing players to walk through them, but they explode if pushed by pistons while on fire.