Ryan Character Creation
Your parents cult was unknown among the Ramkurgi city-state they had infiltrated. They long plotted the return of their master, your sire, Dagon. To this end they consulted the Astrolabium.
The astrolabium is a large, circular disc is an ornate inclinometer, the kind used by astronomers and navigators to identify specific stars and constellations, determine the time of day, establish the angle or steepness of a slope, or correctly identify their present location. While the inside of the object is plain and uninteresting, its exterior facade is far more intriguing.
Its surface features several moving components which are used to impart useful information to an individual qualified to interpret their meanings, though few not versed in the object's purpose are able to do so. It is formed of reinforced metal and its rim has been sharpened.
You know the astrolabium is magical, and you are attuned to it, though you are not sure what it can do. You have managed to unlock at least its core ability. The Astrolabium can be used as an astrolabe. A creature attuned to it can add their proficiency bonus to Intelligence checks made to identify celestial bodies, assess the pitch of a slope, measure the passage of time, and triangulate their position.
If anyone of your former cult survived the event that allowed/caused you to flee, you are certain they will come hunting for the device. The same can be said for any other Cults of Dagon.