Level 00.4

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**Survival Difficulty: Class Habitable**
»⠀Safe
»⠀Sustained Communities
»⠀Devoid of Harmful Entities

**Level 00.4** is the 5th sub-level of the Outrooms.

## Description

**Level 00.4** is a forest-like structure. Unlike the forest from the frontrooms, **Level 00.4** has no horizontal lines. On the contrary, Level 00.4 is more similar to a geographical structure stretched in three dimensions, covered by grass, trees, flowers and other vegetation. Occasionally, the plant is seen growing upside down in the place above.

There is no sky in **Level 00.4**, but due to the high air humidity (about 50-60%), there will be a very light blue fog. Also, **Level 00.4** appears to be quite cool, with a temperature between 15 and 19 degrees celsius.

Another special place of **Level 00.4** is the ubiquitous mercury waterfall. Mercury in these outer chambers flows from higher structures to lower structures, flows down the edges of structures, and forms pools of mercury. Oddly enough, at **Level 00.4** the Mercury toxicity in the Outrooms drops by 90% and begins to be affected by gravity. Including quicksilver brought in from other tiers. When this mercury is brought to other levels, its characteristics will be restored.

* Pool/Lake (mercury pool)
* Cliff (edge ​​area of ​​the structure)
* Waterfall (bottom of Mercury Falls)
* Watchers (also the edge of the structure, but only if the view from here is beautiful, dreamy, and open)
* Portal (a passage on a tall, wide but narrow geographic structure)
* Teleportation location (marking of entry/exit)
* Altars (a pool of mercury located at a high level relative to nearby areas)
* Traces (unknown)

## Plants

This level has abundant plant resources. Some plants and their uses are listed below:

### Green Leaved Trees

Green Leaved Trees are very common tree species in this tier, and its sap is fragrant.

### Shimmering Thorns

Shimmering Thorns are the only harmful plants in this layer. Its thorns will secrete a poisonous substance, which will make the wanderer feel slightly itchy, and will start to hurt in the later stage. It goes away after about 15 hours. Symptoms can be greatly slowed or eliminated by drinking almond water or applying ectoplasmic mercury.

A crystalline substance grows on Shimmering Brambles, which is extremely rare throughout the Back and Outrooms. This substance emits light automatically, and the light emitted has the effect of repelling entities.

### Snow Ferns

Snow fern only grows next to the mercury pool, and the substance secreted in it will make people feel cool. Snow fern can be eaten, and the body temperature will drop by about 1-2°C after eating.

### Big Mercury Leaved Trees

This kind of tree is very huge, at least about 2000m high and 30m thick. The surface of the tree develops fissures and releases mercury from the Outrooms.

### Giant Vines

It appears on a huge "wall"-like geographical structure, at least 3500m long. The plant is also edible, and according to wanderer records, it tastes fine when boiled.

### Pure Flower

Pure Flowers are small white flowers that grow everywhere in this level, and the petals will emit white light. When a wanderer person is nearby, the petals will vibrate and make a sound like a spring. The "outdoor aroma" secreted by this flower will make the wanderer feel cheerful and light. After eating this flower, the gravity of the wanderer will be reduced by about 10%.

### Cloud Flower

The Cloud Flower has 3 lavender petals, but it is most recognizable because it produces a mist that gathers together to form a cloud. Cloud Flower was found to have the function of enhancing the humidity of its surrounding environment.

## Entities

There are few entities at this level, and only the unique entity "Water Chestnut" has been found so far:

### Water Chestnuts

"Water Chestnuts" are small diamond-shaped life form similar to a light guide. It flies in **Level 00.4** and inhabits areas with more stable mercury, such as beside the mercury pool and under the mercury waterfall. The "Water Chestnut" will become more active when the wanderer is near, it will make a sound similar to wind chimes, and the wanderer will feel more relaxed and happy at the same time.

## Resources and Objects

Mercury resources in the Outrooms of this level are very rich, and some flowers contain certain "outdoor floral fragrance substances", which can make wanderers eliminate negative emotions and can also be used for healing, but this kind of substance is extremely rare.

## Colonies, Outposts and Bases

Although very few wanderers have entered this layer, **Level 00.4** has established a base:

### Arzpec Community

* About 7 wanderers
* Welcome new members
* Has settled in **Level 00.4** for a long time, and has the ability to make plants of this level into food. Has been settled for 12 years now.

## Entrances and Exits

### Entrances

In Level 00.3, take out at least 3mL of mercury from the Outrooms of the trash can, then sprinkle it on any building, and then walk forward along the street, and you will reach **Level 00.4**.

### Exits

* Jumping in from any mercury pool marked "Portal" will take you to Level 00.1, Level 00.2 or Level 00.7. Occasionally it will also teleport you to other Outrooms sub-levels.
* Hold a certain amount of Mercury in your hand and make a wish: "I want to go to Level 00.5" or "Level 00.6" will take you to those floors.
* Touch a stick then everything will change into Level 00.999.