A structure can you find in Heart of Ender Dimension !
Heart Ender Wart serve to create new potion type (Potion of Regeneration 3)
More powerful and resistant than the Nether one, it sends you fireballs with an explosion level of 3
Ignoring the player, they will get angry if you look them in the eye and will call for reinforcements if they feel in danger.
Identical to the nether ones, they are blue and have more life, attack and speed.
Having the same abilities as the Nether one, it has more life points, armor, attack and speed.
Like a Wither Skeleton it has an Azurium Axe to inflict a lot of damage in addition to poisoning the player.
Herobrine is a boss that you can summon with an Azurium Block, 3 Diamond Blocks and a Herobrine Head.
Once summoned Herobrine will fly and attack you. Will you succeed in defeating him ?
Requirements for Make a Heart of Ender Portal
And finally the different Apples that the player can use, each giving different powers. The most powerful will remain the diamond one.

A purple aura comes out of it, isn't it the Heart of Ender.