The Mysterious Cavern appears on day 300 in the Player Sect, or earlier if a higher Immortal Difficulty is chosen. The Mysterious Cavern is indestructible and cannot be moved nor demolished.
Location of Mysterious Cavern[]
The Mysterious Cavern will randomly appear in any area of the Player Sect that is not currently covered by the fog of war (map tiles must be fully bright)[1]. It will preferentially appear on unoccupied ground, and will attempt 20 times to spawn, failing which it will destroy any Buildings in its way[2].
What to do[]
- Build a Very Auspicious room around it
- Talk to an Ancient Cultivator about it
Blueprint[]
This simple design will be VA in almost all circumstances
As Weather can affect the Feng Shui of every tile on a map, a room may be Very Auspicious without weathers but lose it at the first change. The proposed design is very auspicious under every weather but Thunderstorm, which is infrequent has short duration (0.3 to 0.8 days) and is easy to dispel, making it manageable.
This is a 5x6 room with:
- 1
Water Vat made from 
Timber on Ice Crystal Ore Flooring, preferably on Shallow Water Terrain created by the Cavern. - 4 Vase (small) made from Ice Crystal Bar
- Wall and Door, in this case made from Marble Block but the material of Walls and Door doesn't matter as their element emit range is too small to affect the water vat.
Interactions[]
While not recommended to do so in most cases, the Mysterious Cavern can be interacted with[3].
Wish[]
It is possible to make a Wish to the Mysterious Cavern if it is not currently demanding a Sacrifice[4]. There are a number of options, all of which require a successful Sacrifice to receive the reward:
- Wish for a Secret - Receive a random Secret from the list (1-12,14-34,49) with equal chance
- Wish for a Qi Swell - Receive the Weather Qi Swell (
LingUpWave_Little) which boosts map Qi by 150 for 1-2 days - Wish for self-improvement - Receive a random permanent buff from the four following buffs, one time per Character:
Sacrifice[]
The Mysterious Cavern demands Sacrifices at certain intervals, depending on the Feng Shui of the Room that it is in. If the Sacrifice is not provided by the Deadline, the Mysterious Cavern is angered and may damage the Player Sect by changing random Terrain to Shallow Water or by causing certain negative Weather. This can happen up to a maximum of 10 times, following which the Mysterious Cavern would show its true form.
| Feng Shui | First Sacrifice (Min Days) | First Sacrifice (Max Days) | Sacrifice Deadline (days) |
|---|---|---|---|
Very Auspicious
|
N/A | N/A | 20 |
| Auspicious | 25 | 35 | 15 |
| Slightly Auspicious | 20 | 28 | 12 |
| Slightly Ominous | 15 | 21 | 9 |
| Ominous | 10 | 14 | 6 |
| Very Ominous (or not in a room) | 5 | 7 | 3 |
Sacrifice Types[]
The Mysterious Cavern may demand various types of Sacrifices, depending on the number of Sacrifices it has previously received. The Tribulation IX constraint "Ancient Awe" increases the Sacrifice Difficulty by 1 regardless of the amount of previous sacrifices, up to a maximum of 3.
| Previous Sacrifices | Sacrifice Difficulty Level |
|---|---|
| 0-2 | 0 |
| 3-5 | 1 |
| 6-9 | 2 |
| >=10 | 3 |
Possible Sacrifices[]
The Mysterious Cavern's Sacrifice demands depend on the Sacrifice Difficulty Level. The Tribulation IX constraint "Ancient Awe" adds Awakened Animals into the possible Sacrifice Demand pool.
| Sacrifice Type | Difficulty 0 | Difficulty 1 | Difficulty 2 | Difficulty 3 |
|---|---|---|---|---|
| Item | 1-5x Tier >= 7, any Element | 1-5x Tier >= 8, specific Element | 1-5x Tier >= 9, specific Element | 1-5x Tier >= 10, specific Element |
| Human
(must be unconscious) |
Any gender | Specified gender | Specified gender, Maximum age of 40 | Specified gender, Maximum age of 24 |
| Food | 25-50x Any Food | 25-50x Meat | 25-50x  Fine Meal or  Lavish Meal
|
25-50x Lavish Meal
|
| Awakened Animal
(must be unconscious) |
>=2 Intelligence Shards | >=3 Intelligence Shards | >=4 Intelligence Shards | >=5 Intelligence Shards |
Gain of Power Level[]
When the Sacrifice is completed, or when the Sacrifice Deadline expires, the Mysterious Cavern gains Power Level depending on the number of previous successful Sacrifices:
| Previous Sacrifices | Deadline Expired | Successful Sacrifice |
|---|---|---|
| 0-2 | 8 | 5 |
| 3-5 | 10 | 8 |
| 6-9 | 15 | 10 |
| >=10 | 20 | 15 |
Spoiler[]
| Spoiler |
|---|
| This is the Flood Dragon Boss. Canonically, the first boss of the game.
When the Flood Dragon is spawned by the Mysterious Cavern, any interactions provided to the Flood Dragon result in it gaining additional Max Qi[5]. Each Power Level granted to the Mysterious Cavern through interactions increases the Flood Dragon's Max Qi by 20% ( |
Screenshots[]
The proposed design detailed above will be Very Auspicious on all terrains and under all weathers except the very short and infrequent Thunderstorm
