Shadow of the Ancients/Story

==Journey to Tsurumi==
The Traveler hears about a commission from Katheryne in Inazuma that involves investigating an area on Tsurumi Island. However, the last adventurer to take up this commission abandoned it without giving details as to why, and nobody has been willing to take it on since. After accepting the commission, the Traveler discovers a Ruin Grader at the site and defeats it, only for the Ruin Grader to regenerate itself and continue attacking.
The Traveler retreats to Inazuma City and informs Katheryne of this anomaly. She directs them to the commissioner — Hosseini, a scholar the Traveler had previously aided during the event Energy Amplifier. Suspecting this Ruin Grader is drawing from the ley lines for power, unlike ordinary ones which rely exclusively on their Chaos Cores, Hosseini suggests they use the Pursina's Spikes he had shipped from Sumeru to disrupt the flow of the ley lines. However, because the Spikes were damaged in transit, Hosseini gives the Traveler Ayesha's Chaos Prospector, which searches ancient ruins for the relics needed to repair the Spikes.
===Survey Sites===
The following ruins contain relics that can be used to repair Pursina's Spikes:
* Stormterror's Lair (the capital city of Decarabian's Mondstadt)
* Yaoguang Shoal
* Qingxu Pool
* Tatarasuna
==Autonomous Mechanical Energy Source: Preface==
===Sampling Points===
The test runs for the final calibration are conducted in the same places where the relics were found:
* Stormterror's Lair
* Yaoguang Shoal
* Qingxu Pool
* Tatarasuna
After completing the calibrations two Special Sampling Points will appear:
* Dragonspine
* Guyun Stone Forest
==Autonomous Mechanical Energy Source: Live Sample==
===Anomalous Model Ruin Grader===
==Autonomous Mechanical Energy Source: Conclusion==
After placing the Pursina's Spikes in the investigation area and cutting off the Ley Line power flow, the Traveler successfully defeats the Anomalous Model Ruin Grader and informs Hosseini of this good news. Hosseini wishes the investigate further and asks to see the remains of the anomalous model, however the Traveler destroyed it completely; Hosseini remarks on the colossal waste but he takes the blame for not telling the Traveler to leave behind enough for taking samples. Afterwards, Hosseini briefly talks about his struggles in Inazuma so far and considers changing his research topic to the Pursina's Spikes.
pt-br:Sombra dos Antigos/História
ru:Тень древности/История
vi:Bóng Hình Cổ Xưa/Cốt Truyện