Phase 0

This is the start of the boss fight. The dragon is at full health and all the pillars have their end crystals. In this phase, the dragon is immune to all damage.

Phase 1

After destroying 6 end crystals, the dragon transitions into phase 1. The dragon is no longer immune, but in this phase will never perch on the exit portal.

Phase 2

When the dragon reaches 75% health, it enters stage 2. The dragon will now perch on the exit portal but every 30 seconds, a few enderman will get angry at you.

Phase 3

When the dragon reaches 50% health, it enters stage 3. The dragon will unleash its wrath on you. It will rain fireballs upon you, with one dropping every second and large batches of 10 fireballs dropping every 30 seconds.

Phase 4

This is the final phase. The dragon has reached 25% health and will do everything in its power to avoid death. It will summon a group of phantoms for protection (the number of phantoms spawned will depend on the number of players fighting). The miniboss of phantoms will grant the ender dragon resistance as long as they are alive.