after beating the game.

After beating the game by killing the dragon getting the elytra and maxing out armour, the world gets boring and all you do is build so, a new stronger boss or mob that has the same thrill as the dragon like having to go to the nether first then destroy the crystals before killing it, this could be in a new dimension or current or in a certain biome. The boss or mob would give a good reward like the dragon and wither and be hard to kill recommending having good armour first. This idea could keep players attached to their world for longer and be more proud with their progress in that world. This wouldn't be a addon but part of the actual game.