The Boss Dimension

A Dimension just like the end with the islands, but the islands are made of nether materials and this world has ghasts, endermen, and wither skeletons as its basic mobs. On each island, there would be a wither. This wither would be the boss of the island. All the mobs on the island would do everything to protect it. You have to defeat the mobs and you have to kill the boss to get to the next island. Half of the islands would have the ender dragon and have end materials, but work like the rest of the islands. This way, you would not have to keep respawning the ender dragon and you could just play the whole thing in survival. You can only create the portal to this dimension in the Nether or the End and when you drop your stuff, it automatically teleports into the nearest chest or shulker box. There would be two types of portals. One for the end and another for the Nether. The Nether one would be a full frame of netherite and lit with the flint and steel that you used to get to the nether. The End one would be end stone bricks lit by an ender pearl.