Level 2!

I think there should be a mechanic in the game where once beaten a significant boss eg. Ender dragon or wither, you should go into 'level 2'. This would be where new and harder mobs will spawn and new ores would be added in. These would craft more powerful weapons to fight against new bosses, eg. King gorilla, the illager king. These bosses would be significantly harder and would also have a higher payoff, dropping game hanging pieces of armour and weapons. I think this should be added as it would add more thinks for a player to work towards and people would stay on their worlds for longer without creating new ones. Also it would create more variety In the game