In order to complete the quest “The Invitation” you have to find the Imperial Treasure Map in the Well of Flames on Nessus.
We’ll show you the exact location of this map to open the chest on Nessus. To make this easier, if you track it in your Pursuits, the Imperial Treasure Map location will then appear on the map as a cross.
Well of Flames Location
The Well of Flames is specifically found to the far south-west, and is a massive cylindrical structure with a triangular entrance to the side.
Follow the video guide below to unlock the Rune of Jubilation.