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Purity Reveals the Stubborn Stone is a Main Mission in the The Long Feud quest series of Arknights: Endfield. Check out how to unlock this mission, its walkthrough, and all its rewards in this guide!
| Previous Mission | Next Mission |
|---|---|
| Ripples Spread Throughout the Flow | Twas One River That Gave Us Drink |
List of Contents
| Mission Type | Main Mission |
|---|---|
| Quest Line | The Long Feud |
| Chapter | Chapter 2 - Process 3 |
| Location | Qingbo Stockade, Wuling |
Purity Reveals the Stubborn Stone is the eighth quest under the The Long Feud mission series. This quest is under Chapter 2 - Process 3 of the main story and is located in Qingbo Stockade.

How to Unlock Purity Reveals the Stubborn Stone is unlocked after completing Ripples Spread Throughout the Flow from The Long Feud quest series with no level restriction.
Ripples Spread Throughout the Flow Guide

Head to Qingbo Stockade and locate the riverbank by following the quest marker. There will be a small cutscene that will play, and the next objective will follow suit.

Interact with Tangtang to start the next objective. You will be transported to a different section of the map after another cutscene. Start running through the platforms and follow the quest marker throughout the run.
There will be a short sequence where Tangtang activates a gate to get you through a portion of the stockade. Follow through the stockade and exit to enter another cutscene with some enemies.
Tangtang Banner Schedule and Dates

You will enter a forced combat sequence with some of Ruan Yi's Loyalists again. Clear them out and head to the next section of the Stockade.

After the battle, follow the Objective Marker to find the Control Panel and help Tangtang get through the area, but Tangtang won't be able to proceed due to the elevator not having power.

Press the panel again to rotate the bridge to your position and through the power device to the left. Hit the device with your attacks to align the water pipes and allow it to provide power for the elevator.

You can meet up with Tangtang afterwards by using the grapple hook to reach her on the upper platform. You two will then head to a seemingly ornate office, where a cutscene plays out.

You can then start searching the room by interacting with the interactables marked for interaction, each telling something about Ruan Yi's exploits.
Tangtang will ask for help opening a locked crate. Approach her, and a cutscene will play. Once done, keep advancing to open the next section.

You will enter a short forced walking session after this, and a cutscene regarding the fate of the Stockade. Once the cutscene ends, you will enter another combat section with Ruan Yi's Loyalists.

You will be surrounded by several Loyalists at the start of the fight, but you will be using Tangtang primarily for this combat section, so use her abilities to your advantage!
Once all enemies are taken care of, you will reach another lengthy cutscene about the aftermath of the quest's events. Your rewards will be given after this fight, but the quest itself is yet to end.

You will head back near the Ancestral Spring after the prior cutscene. Follow the quest markers to find Tangtang, after which, you can watch the conclusion of this mission and head to the next one.
| Total Quest Rewards |
T-Creds x10000 |
Protohedron x3 |
Origeometry x2 |
|---|---|---|
This quest also provides 400 Operational EXP upon completion.

Purity Reveals the Stubborn Stone Main Mission Guide

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