Plains of Mist 100% Completion Guide
★ Trending: Puzzles | Codes | Jeljin | NG+
☆ Starting out? Check our Beginner's Guide
┗ Combat | Builds | Weapons | Tier List
★ Walkthrough | Good Deeds | Mysteries
┗ Timeloops | Vaults | NPCs | Enemies
☆ Missables | Game Length | Trophies
Plains of Mist is a main location in Hell Is Us. Find out more about Plains of Mist's Good Deeds, Mysteries, puzzles, Vault of Forbidden Knowledge, important loots, Timeloops, NPCs, and a Walkthrough for Plains of Mist here!
List of Contents
Plains of Mist Walkthrough
1. Enter the Temple of the Fallen When Searching for the Keystone of Ecstasy
| Step | Objective |
|---|---|
| 1.1 |  After getting the Letter - Land Grant in Vyssa Hills, travel to the Plains of Mist via the APC. Climb up the hill near the entrance and make your way through the ruins. While exploring the ruins, you will see symbols on the walls. Take note of the symbols and the shape of its plate. You will need this later. |
| 1.2 |  Walk north until you reach the grand staircase that leads up to a giant door; this is the Temple of the Fallen. Use the Twin-Headed Serpent to reveal a dial puzzle. There are two timeloop guardians situated to the right of the temple where the Mossy Key can be found, which is related to the Overgrown mystery. |
| 1.3 |  If you've managed to collect the symbols around the ruins, this is where you'll use them. Input this from top to bottom, Sword, Diamond, Sun, and Eye. ▶︎Plains of the Mist Entrance Puzzle Guide |
| 1.4 |  Enter the temple, climb down the stairs until you reach the Sanctum where the Timeloop is. Go to the bridge left of the timeloop |
| 1.5 |  You will reach a room with a statue of a chained hollow walker. Quickly run to the right to avoid getting hit by the Artillery Walker on the ledge. Follow the tunnel until you reach the door with a lever. Pull the lever and enter the next area. |
| 1.6 |  Defeat the enemy across the bridge, then pull the lever to open the next door. Travel down the path until you reach the next save point |
| 1.7 |  In the area where the save point is, take the path to the left. Taking the path to the right will take you below the bridge, where you can grab the Lymbic Rod. |
| 1.8 |  On the intersection, continue straight ahead if you want to defeat the Timeloop Guardian. If not, take the passage to the right and cross the bridge |
| 1.9 |  This path will exit into a large hall with a large staircase. Be careful since this hall will be filled with enemies. Make your way up the staircase and pull the lever to access the next area. |
| 1.10 |  Scan the tablet to understand the mechanics for the Trial of Lies and Truths. Approach the door and step on the correct answer for the tiles on the tablet. Use the pattern right of the Sun, left of the Moon, and left of the Tree. Making a mistake will lead to your death. ▶︎Pressure Plate Puzzle 1 Guide |
| 1.11 |  Enter the next area, and cross the bridge. Follow the path forward and take note of all the monoliths you pass by. This cavern will have the first 2 monoliths. The gate will be locked when you reach the top, so go back down and cross back to the other side of the bridge. Enter the passageway right of the bridge and climb up the scaffolding inside. Pull the lever to open the gate; this will also open the gate on the other side. |
| 1.12 |  Go back to the area where the 2nd monolith is and go out the now open gate. Carefully make your way down the scaffolding and enter the passageway at the end of the corridor. |
| 1.13 |  Enter the doorway beside the stairs and cross the bridge. Explore the tunnels to find the 3rd and 4th monoliths. When you're done, go back to where the staircase is. |
| 1.14 |  Climb up the stairs and defeat the Timeloop Guardian on the bridge to cross to the other side. When you reach the stairs surrounded by statues, there will be a chest with the Twin Axes of Ecstasy . |
| 1.15 | Enter the sealed door that will lead into a room with a tile puzzle. Step on the tiles according to the order of the monoliths you found. It is Hands with Hourglass, Dagger Eye, Backstab, and Twin-Headed Snake. ▶︎Pressure Plate Puzzle 2 Guide |
| 1.16 |  Enter the passage and defeat the horde of Hallow Walkers inside to reach the next door. |
| 1.17 |  This door will lead into the last area of the temple. If you managed to find the Lymbic Rods needed, you can open the Lymbic Chest - Temple of the Fallen beside. Make sure to grab the Ancient Lymbic Forging book from the chest as well. |
| 1.18 |  When you're ready, pull the lever and enter the Boss Room. Approach the altar and interact with the keystone to activate the boss fight. |
| 1.19 | In this fight, you'll mostly be fighting multiple Hazes of Ecstasy. Defeating one increases the yellow gauge at the top of your screen. Once the yellow gauge is full, the boss will spawn. At times the haze will be attached to the cones, break the cones they are tethered to, to damage the haze. Later in the game, these cones will turn into turrets. Take these down quickly to avoid excess damage. ▶︎How to Beat the Haze of Ecstasy Boss |
| 1.20 |  After defeating the boss, you will receive the Keystone of Ecstasy. Return to the APC and talk to Tania to ask about the other symbols for clues where the other keystones are, or right back to Lake Cynon if you have all three. |
Searching for the Keystone of Ecstasy Walkthrough
Plains of Mist Quests
Plains of Mist Good Deeds
| There are no Good Deeds in the Plains of Mist |
Plains of Mist Mysteries
| ✔️ | Items | Details |
|---|---|---|
 Ascetic Vows
|
Rewards: |
|
 Lymbic Chest - Temple of the Fallen
|
Rewards: |
|
 Overgrown
|
Rewards: |
Lady Sophia's Journal - Francis
Francis' Journal - Queen's Envoy
Tuning Stone - Strong
Idol of Ecstasy - Battle TranceAll Mystery Solutions and Locations
Plains of Mist Puzzles and Codes
Plains of Mist Puzzle Solutions
| There are no Puzzles in the Plains of Mist |
Plains of Mist Codes
| ✔️ | Code | How to Solve |
|---|---|---|
Plains of the Mist Entrance Puzzle |
This is the code to the entrance of Temple of the Fallen in Plains of Mist. Code: Sword, Diamond, Sun, and Eye |
Plains of Mist Important Loot
Plains of Mist Exploration Items
| ✔️ | Item | How to Get |
|---|---|---|
 Key - Mossy
|
Found in the Plains of Mist. Unlocks the Hidden Chest near the Temple of the Fallen. |
List of All Exploration Items
Plains of Mist Research Items
| ✔️ | Item | How to Get |
|---|---|---|
 Skull in Box
|
Found in the Temple of the Fallen at Plains of Mist. |
Plains of Mist Investigation Items
| ✔️ | Item | How to Get |
|---|---|---|
 Keystone of Ecstasy
|
Found in the Temple of the Fallen. Used in the Lymbic Forge. |
List of All Investigation Items
Plains of Mist Points of Interests
Plains of Mist Vaults
| There is no Vault of Forbidden Knowledge in the Plains of Mist. |
Plains of Mist Timeloops
| ✔️ | Timeloop | How to Solve |
|---|---|---|
 Temple of the Fallen |
The Temple of the Fallen Timeloop is located at the entrance of the temple. Once you enter the temple, you'll immediately see it in the middle. |
All Timeloop and Guardian Locations
Plains of Mist NPCs
| There are no NPCs in the Plains of Mist. |
Plains of Mist Summary
Location Overview
| World Map | In-Game Map | ||||||||
|---|---|---|---|---|---|---|---|---|---|
 |
 |
||||||||
| Related Investigations | Zones | ||||||||
|
Act 2 ・Searching for the Keystone of Ecstasy |
・Temple of the Fallen | ||||||||
| Threat Level | |||||||||
| III | |||||||||
| Description | |||||||||
| A dense fog permanently wreathes this region, concealing the bloody atrocities that transpired here centureis ago. | |||||||||
Hell is Us Related Guides
Story Walkthrough and List of All Acts
Complete Walkthrough
100% Location Completion Guide
| List of All Locations | ||
|---|---|---|
| Senedra Forest | Acasa Marshes | Vyssa Hills |
| Lake Cynon | Lethe - National Library | Plains of Mist |
| Marastan | Talju | Lethe - Ministry of Cultural Primacy |
| Jeljin | Auriga Museum | - |
| Sub-Areas | ||
| Watcher's Nest | ||
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