[X] The strange artifact you have oblidged to solve the mystery of for Faceless men is much of a mystery. But perhaps, the powerful mages and entities you are in contact with could provide some clues?
-[X] Ask the Blink Dogs in your employ. If anyone can tell you anything related to stars and their movements, that'd be them.
-[X] Ask Zherys, his mystical knowledge, experience, and access to Volantine archives might hold an answer.
-[X] Ask Melisande, her experience and knowledge of shadow-magic could hold a clue.
-[X] Ask Xor and Jeyne if they feel anything Psionic/aberration-related about the thing.
-[X] Ask Yrael and other Archons, sepcifically the knowledge archons.
-[X] Ask Erynies, in case the thing is connected to diabolical or celestial sources.
-[X] Ask Shadow!Tor, if anything about it bears resemblance to things of Asshai-within-shadow.
-[X] Quickly shuffle through Codex-Uniila with appropriate spells, seeking patterns like those on the artifact, or things of similar nature within her memory, to, hopefully, understand its nature better.
-[X] Ask the ghosts of Essarian scholars if they know anything about this.
-[X] Ask Rizz'Neth if anything about the enchantment seems familiar to him.
-[X] If nothing else works, ask the most experienced of Bulabar in your employ take a non-invasive look at it and it's mechanism, helped by (and, if needed, held at bay by) magic of a suitable Companion.