Wizard Dimension (The End is Just The Beginning)

Obtain the item called "the heart of the end dimension" in the end city inside a new structure. 

Activate the item on the beacon and it will open the new dimension gate in the sky (this give a reason for player to defeat the wither boss and make the beacon)

Explore a new dimension and craft a new wizard clothes set, so the witch and wizard wont be hostile towards you. Then, you can trade a rare enchantment book.

Defeat the boss inside the castle to obtain magic wand (a new weapon)