Fairy Ring (Mushroom Ring)

New structures should appear in Minecraft — fairy rings. This is a phenomenon from the real world — mushrooms tend to grow their fruit bodies in a circle, expanding the ring more and more. 

In the forests, fields and meadows of the Minecraft world, the same structures will now be generated, varying in size. As in reality, mushroom circles can be small and large, and when large circles hit a tree or other obstacle, they break the ring and make it amorphous. Circles can consist of only one type of mushroom. Also this structure should be rare.

A thin layer of rooted dirt is generated under the fairy's ring, which will become an additional source of it for the player.

The main feature of the mushroom ring will be to help determine the location of the mushroom island. There will be more rooted dirt in the direction where the nearest mushroom island is located, as if the fungus itself is trying to get there. This will provide a very simple, not overpowered and inscribed in the world way to find this rare island.