New dragon attacks

If there were something like the battle with the Ender Dragon, it could have phases. For example, after losing 1/4 of its health, it would become stronger and angrier. Instead of just breathing fire, it could start grabbing the player with its claws and throwing them from a great height. After losing 2/4 of its health, the dragon could start flying straight at the player like a projectile, dealing massive damage. After losing 3/4 of its health, it would become certain death for the player."