Creature Healthbars

For example if you are fighting the ender dragon, the health bar would be purple and would have a replica of the ender dragon´s face in the middle with it´s wings comming out on the sides, the wings on the health bar would flap when the ender dragon "lands" on the portal to the overworld.

The wither health bar would be black and in the center would have 3 wither skulls, you would be able to slightly see the withers ribs holding the health bar, one of the wither heads in the health bar would open when it is shooting at you specifically.

The warden would have a health bar, it would be blue and in the center have the wardens "ears", a cool thing that would be added is that the "ears" in the health bar would move when the warden is searching for you specifically.

The Elder Guardian would have a health bar and it would be cyan and you would be able to see some bubbles inside the health bar, a laser beam would appear in the health bar, removing all the bubbles when the Elder Guardian is charging its laser at you.

The healthbar for normal mobs would be red and would say the name of the mob on the left side of the health bar, they would not have some kind of special mecanism like the warden,wither,elder guardian or ender dragon.

Of course theese animations only work when you are actually fighting the boss. 

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