The Sky Pyramid - A new flying structure

Hello everyone, since I was little I noticed that the sky of minecraft has always been very empty, bare, with a lot of potential that has never been exploited to one hundred percent.
So I had an idea, why not add a new flying structure, for example a pyramid, which you can see in the sky? It would be built of indestructible blue blocks, which are confused with the sky, so that it is less visible. The structure would be a kind of maze full of pitfalls, like traps that make you fall to the ground if you walk on it, monsters of all types and sizes, small puzzles to solve to continue etc... 
Once you get to the center of the structure, you would find the boss room, a huge super strong winged creature, which once defeated releases an egg of a celestial creature, that once hatched and grown up the player can ride it and guide it, Flying freely in the sky. It would obviously be slower than the elytras, but it wouldn’t need rockets to keep flying.
You could also add other flying creatures, hostile or not, or new blocks to build with.
I hope you like this idea!