Below is a walkthrough for the Level 20 Relic Ruins: The Stillsands quest in Horizon Forbidden West. You can listen to a Rumor at one of the various camps or just head directly to the site to acquire the quest.
Explore the Ruins
The ruins can be found north of Hidden Ember. Drop down into them then look for a crate on a higher level near the center of the room. Drop this crate to the bottom level then push it north following the water. When you reach the fire gleam, ignite it then push the crate through the hole. Use the crate to reach the higher level then open the valve. Afterwards, push the crate to the drain to block it causing the water to rise. You’ll then be able to swim back to the main room. Head to the east side to find a set of stairs.
Climb up them to find the Store Key. Continue up the path to find the Beat Smart Poker! Datapoint. Next, head up to the northwest side of the large room to find a locked door.
Insert the key into the terminal to open the door then head inside. Retrieve the crate and drag it into the water. Return to the pump room and turn the wheel to stop the water. Use your Pullcaster to pull the crate from the drain. This will cause the water to drain. You’ll then want to return to the main room and push the other crate under where the ornament is right under the climbable ledge. Return to the pump room then turn the wheel to cause the water to flow again. Push the crate in front of the drain to flood the room. Swim back to the other crate and use it to reach the ornament!
Rewards
- 5000 XP
- 2 Skill Points