Kadara needs clean drinking water — streams and lakes are toxic and filled with sulfuric acid. Remnant technology could transform Kadara's water supply, but the monoliths around the planet must be activated to begin this process.
Acquisition
This mission is added to the Journal when Pathfinder Ryder gets close to any of the three monoliths on Kadara.
Walkthrough
Note: The monoliths can be activated in any order.
Activate Monoliths (0/3)
- Eastern Monolith
The Eastern Monolith is north of Kadara Port. Approaching the location will start an objective to scan Glyphs.
The Outlaw Monolith
Scan For Glyphs (0/3)
Find two glyphs are scannable from the ground and one requires climbing up some rocks to reach. They are the Adherence Glyph, Entropy Glyph, and Zero Glyph.
Climbing up some rocks to one of the glyphs, there is an Adaptive Remnant Core Device to scan for +100 
. There is also a container that can be looted.
Activate The Monolith
After scanning the three glyphs, interact with the console to activate the monolith. Solve the puzzle to activate the monolith. For the puzzle console solution, see here.
- Western Monolith
The western monolith is accessed through a canyon like crevice from the west in the Sulfur Springs region. Ryder will find a group of angara fighting exiles. Approaching the crevice will start an objective to scan Glyphs.
The Outlaw Monolith
Scan For Glyphs (0/2)
Find two glyphs (scannable from the ground). They are the Hydrodynamic Glyph and Nihility Glyph.
Activate The Monolith
After scanning the two glyphs, interact with the console to activate the monolith.
Ryder can speak to the Local Angara after the fight but this conversation doesn't get Ryder anything.
- Southern Monolith
The southern monolith is accessed from the east through a cave in the Draullir region. Entering the cave starts an objective to scan Glyphs. Ryder will find a trail of Observers riddled with bullet holes on the way into the cave. Raiders with a Hydra have to be eliminated.
The Outlaw Monolith
Scan For Glyphs (0/4)
There are four glyphs to scan in this area The four glyphs are the Interval Glyph, Kinetic Glyph, Semiosis Glyph, Thermodynamic Glyph. Three of the glyphs can be scanned standing on the ground, the fourth is in the previous "room" in the cave.
Activate The Monolith
After scanning all four glyphs, interact with the console to activate the monolith.
Investigate The Vault's Entrance
Travel to the vault location which is located southwest of the Forward Station in the Haarfel region. Open the door and take the gravity well down into the vault.
Activate The Vault's Emergency Power
Use the console on the upper ledge. Below the console, Ryder can scan for +100 .
Remove The Vault's Lockdown
Use the three consoles surrounded by bubbles to open the door into the vault.
Warning: Entering the bubbles to activate each console causes damage to Ryder's Shields. Once each console is activated the damage will cease.
Note: The big console is used when Ryder is escaping the vault.
Go down to the hexagonal platform.
Note: There is a console on this platform, but the player doesn't need to use it to attain anything in the vault.
Jump up on the pylons to the right. There is +100 to scan.
Use the bridge to go to the north side.
On the platform is a barrier-locked room with rem-tech Ryder can pick up during the escape. SAM sets a navpoint for it.
- The Puzzle To The West
Follow the path to the west. Jump up to the topmost ledge and use the console to unlock the door.
Inside is a Destroyer, some other Remnant forces, and a turret in the far end of the room.
On top of the pillar in the center of the room is a puzzle-locked console (needed for the Cryptographer Achievement). 2 skill points are rewarded for solving the puzzle. For the puzzle console solution, see here.
- The Remnant Data Core
There is a Remnant data core up to the north. Open the door and go into the room. Inside is another door that is locked. Activate the nearby consoles in the same order as the glyphs on the door. It will then be unlocked. Inside is a Remnant Data core for Task: Remnant Data Cores, and +300 to scan.
- Unlock The Locked Room To The North
Walk to a point where Ryder can see the locked door to the north. Use the scanner to see the line in the air from the door to find the console that unlocks it. Jump up and activate it.
If Ryder continues along the ledges to the southwest, there are some containers on them.
- Getting To The Core Of The Vault
Ryder has two options to get to the northeast and east area:
- Return to the first hexagonal platform and use the console. Platforms rise from the fluid, and jumping between them will take Ryder to point #3. An effect of this is that during the escape - after picking up the rem-tech - Ryder will need to jump down on these platforms to reach the exit.
- Go to point #1 and jump over to point #2. Ryder will probably land in the fluid. Quickly jump again to get out of the fluid.
From #2 jump up on the ledge. Then jump up to get +100 from the Adaptive Remnant Core Device (the jump might take some attempts).
Jump down again and activate the console. Two pylon platforms rise from the fluid. Use them to get to the locked room (now unlocked) and loot the container.
Go to point #3.
Jump up to collect +100 to the south of the door.
Use the console to unlock the door to the vault core. The door opens, and the platform in the fluid Ryder needs for the escape disappears.
In the core room, Ryder will have to activate the five smaller consoles to be able to use the Purification Console. Remnant enemies will appear when Ryder uses the smaller consoles. As before, entering each bubble causes damage until the console is deactivate. After Ryder has defeated the enemies, make sure to pick up the container in the ring of shields.
Activate the purification console. Note: The Fusion Mod of Rapid Deployment is awarded when the console is activated.
Escape The Purification Field And Exit The Vault
Run out and use the console at #3. Then follow the escape path.
Pick up the rem-tech on the way out.
Use the Activation Console in the gravity well room to turn off the purification field. Exit the vault.
Aftermath
The sulfur pools are no longer dangerous. The pools now look like unpolluted water and are safe to walk or drive into.
Rewards
- +1330 XP
- +900 AVP
- +40% Kadara viability
Puzzle Solutions
Eastern Monolith
Vault Puzzle