a new dimension

A new dimension in Minecraft would be great for everyone its getting boring with only the end nether and overworld there could be a new boss to come with it like a boss that would drop you a weapon or item. The item could be like a new armour so you would have to kill 4 different bosses or a elytra that doesn't need fireworks if its a sky battle. for the weapon you could have a sword that deals 10 attack damage without enchants. in the chests at the boss battle arena it would be a labyrinth with a new mob that also deals damage in the boss battle. the labyrinth would be mainly made out of a new type of bricks from the ground in the dimension. to get to the dimension you will have to go to the ancient city and light the portal with a special flint and steal that would be found in the ancient city.