Genshin Impact: By Battle Be Settled Achievement Guide

By Battle Be Settled is an achievement that requires Night Jade, and in return, will give you a whopping 5 treasure chests (and 2 of them are Luxurious). It's easy enough to understand but might take some time to complete because there are multiple quests you need to remember.

How to Get Shattered Night Jade and Night Jade

First of all, you need to collect 3 Scattered Night Jades. All three of them are from different quests and this is what I meant that it might take some time to complete, unless you already complete all of them.

Shattered Night Jade #1

For the first Shattered Night Jade, you can get from one of the Precious Chests inside the Revelations from the Past Quest. At the end of this quest, you will be transported to a serene area with 3 treasure chests. Make sure to claim the Precious Chest and you will get the Shattered Night Jade.
Here is the full guide for said quest: Between Pledge and Forgettance Quest Chain Guide

Shattered Night Jade #2

The second Shattered Night Jade can be found via one of the hidden quests in Natlan where you infiltrate Fatui's research facility east of Ancestral Temple. It's called a hidden quest because there's no title for this quest but the task itself is pretty long; saving the trapped Saurians from being experimented on.
At the end of this task, you need to defeat a group of Fatui and a Luxurious Chest will appear. Claim at chest and you will get the second Shattered Night Jade.
Here is the full guide for said task: Righteous Resistance Achievement Guide

Shattered Night Jade #3

The last Shattered Night Jade is inside the To the Night, What is the Night’s quest. Help a Natlanian return a statue back to the altar inside the Ancestral Temple. The quest is not that long but the steps to get that quests involved completing 3 puzzles.
At the end, you will successfully return the statue and immediately get a Shattered Night Jade. And when those 3 are in your inventory, the game will conveniently glued it all together until you get a single Night Jade.
Here is the full guide for said quest: To the Night, What is the Night’s Quest Guide

Where to Use the Night Jade

Now that you have the Night Jade Quest Item, teleport to the waypoint near the Speaker's Chamber and glide south until you see the piece of rocks on the ground. Interact with it and give the Night Jade so you can enter the Chamber of Night's Trial.

Talk to the Nightsoul Spirit in front of the Luxurious Chest to start a challenge. Complete the challenge and you will unlock all 5 treasure chests in this location and get the achievement By Battle Be Settled.