After the perilous war in Inazuma, people are slowly getting settled into peace once again. However, you do not seem to be getting new commissions from Inazuma. After talking to Katheryne, you find that there are dangerous monsters roaming the area and you are tasked to find the source of it.
The Labyrinth Warriors is a new event in Inazuma and you can activate it by talking to Katheryne. Go to the Tenryou Commission to find Xinyan. You will also find Kujou Sara here and she will ask you to scout the Domain. Once you go to the domain, you can begin the event called Labyrinth Warriors.
Path of the Taishou
Once you finish all the missions in the event, you will get a quest called Path of the Taishou. Go back to the domain and pay Shiki Taishou a visit. Talk to Shiki Taishou and he will tell you that the Tenryou Commission believes that he is innocent.
He will also tell you that he was able to install the Mystic Onmyou Chamber to its original state. Once you are done talking to Shiki Taishou, he will give you 60 Primogems, 3 Hero’s Wit, and 30,000 Mora. This will also complete the quest called Path of the Taishou.