User:GammaMicroscopii

The Mushroom Fields biome is the rarest main biome. It is a lush biome. It is meant to be found fully encompassed by oceans, however sometimes it can generate touching other land biomes. It has only one variant.

Description
Mushroom fields biomes consist of a mixture of flat landscape and steep hills and has mycelium instead of grass as its surface. A large amount of brown and red mushrooms cover the mycelium. It is one of the only biomes where huge mushrooms generate naturally, generating as trees, with a density enough to be a reliable source of huge mushroom blocks, but not to obstruct the vision very much. Here, mushrooms can grow in full sunlight.

No mobs other than mooshrooms spawn naturally in this biome, including the usual night-time hostile mobs. This also applies to caves, abandoned mineshafts, and other dark structures, meaning exploring underground is supposedly safe. However, mob spawners will still spawn mobs, and the player will also still be able to breed animals and spawn mobs using eggs.

This biome is one of the toughest for survival, especially because of the extreme rarity and non-renewability of wood, being abandoned mineshafts the only source, which also contain poisonous spider spawners; however, once gathered the first seven wooden planks blocks, food may be a lot easier to gather, as mooshrooms will produce mushroom stew anytime the player right-clicks them with a bowl.

Lack of mobs also means lack of any mob-related resource like wool, string, bones, gunpowder, feathers, spider eyes or ender pearls, some of them having various crucial uses for survival like crafting beds, arrows or ender eyes. As the player cannot make a bed to sleep or a bow and some arrows to fight, phantoms will likely terminate the unprepared player as soon as they cross the biome border for any reason.

Variants
Mushroom fields have only one variant, for a total of two different mushroom fields biomes.

Mushroom Field Shore
Mushroom Field Shore (known as MushroomIslandShore before 1.13) is a technical biome, that represents both the shores and the rivers of the Mushroom Fields biome. It generates when a river cuts through a mushroom fields biome as well as when the mushroom fields biome borders an ocean biome, only if the ocean is not a deep variant, in which case a steep cliff will generate instead. The terrain of this biome is much flatter and shallower in elevation than the main mushroom fields biome, though it is equal to the main mushroom fields biome in any other way.