End Crystal

An End crystal is an entity that can be crafted or found on the End's main island, where it heals the ender dragon. It can be placed only on obsidian or bedrock, and it explodes instantly when attacked or damaged in most ways.

An End crystal is found on the top of each obsidian pillar on the central island of the End, each on top of a bedrock block. There are 10 End crystals in total, two of which are protected in "cages" of iron bars. All End crystals respawn one after another as the respawning process of the ender dragon starts.

Their primary purpose is to recharge the health of the ender dragon, who gains a charge from the nearest crystal within a cuboid extending 32 blocks from the dragon in all directions. The dragon is healed 1HP each half-second. If multiple ender dragons are spawned, an End crystal can affect multiple dragons at the same time. Entities and blocks neither obstruct the healing beam nor diminish its power.