How to get the offering key in Korthia

In Korthia, there is a chest in the southern part (Vault of Secrets).

When clicking on it, it says that it requires an offering key to open it.

This key is actually very close to the chest. It is located on the other side of the building that is opposite the chest. You just need to run up from the side (see the image).

21 May 2021