evolution game option

I think an option to be able to evolve throughout the 'ages' in settings would be a good edition to the game and could be either an option or a difficulty setting as change and adaptation could be a challenge and would be an interesting way to continuously engage a player who is looking for a different level and atmosphere to minecraft while still enjoying its art style, mechanics and core story. survival. But i feel like evolution would give it that sprinkle further to make surviving and defeating mob bosses feel alot more rewarding as things change and improve with each one