The quest titled Where Once There Were Arms Aplenty represents the penultimate challenge in the expansive Chronicler of the Crumbling City questline within Genshin Impact. Following the pattern established by its predecessors, players will again confront areas steeped in Abyssal energy needing purification.
To initiate this quest, players must first complete Where Once Force Was Reversed. This earlier quest is situated in the western part of Dragons’ Residence within the Ancient Sacred Mountain region. Once you have successfully finished that quest, engage with the prominent Secret Source Servant to learn about the next site that requires your attention.
Step-by-Step Guide: Where Once There Were Arms Aplenty Quest

Upon discussing with the Secret Source Servant, you’ll be directed toward the Ruined Armament Workshop located to the north.

As you reach your destination, you’ll encounter a heavily infested area populated by Hilichurls and afflicted by Abyssal Corrosion. Defeat this initial wave of enemies, but be prepared; Abyssal Oozes will soon join the fray.

Expect a second wave comprising more Hilichurls, along with Rifthounds and a Tenebrous Mimiflor, all while more Abyssal Oozes appear. It’s crucial to have a dependable healer in your party to mitigate damage from the Rifthounds and the Abyssal Oozes’ assaults. Continue this battle until only the corrupted mud balls remain.

To eradicate the Abyssal Oozes, often humorously referred to as “mud balls”by Paimon, utilize a character from the Collective of Plenty, such as Varesa or Iansan. If these characters aren’t part of your lineup, approach the nearby Tatankasaur Spiritsconce. Transform into this creature and utilize its charged attack ability to effectively destroy the Abyssal Oozes.

With all Abyssal Oozes eliminated, proceed to the central mechanism tainted by Abyssal energy. Activating this mechanism will cleanse the area of its corruption.

This concludes the Where Once There Were Arms Aplenty quest in Genshin Impact. Completing this mission yields the third and final Phlogiston Unit alongside several treasure chests, specifically:
- 1 x Precious Chest
- 1 x Exquisite Chest
- 1 x Common Chest
Upon conclusion of this quest, you will move one step closer to the grand finale of the Chronicler of the Crumbling City quest series. It is important to note that finishing Where Once There Were Arms Aplenty will unlock the subsequent quest, The End of the Road.