Biome Blooms In 1.17

What this does is you can have new structures, say for example an amethyst cavern, but with a 0.00001% chance of getting it with a Biome Bloom, it will spawn with extreme rarities, for example having it floating in the air, but ripped apart in chunks, like it has been ripped apart from the original cave. This is an example of a Biome Bloom. Developers feel free to make your own Biome Bloom