Really nice and flavorful, with lots of interesting little details! I love how the materials help guide decisions and connect items across rooms (like the orichalcum key+coffer)
The one thing that I’m not sure is how the players are meant to link the constellation groups. 1 is clear and guided by the Amphisbaena, but 2-3 and 4-5-6 are spread in different rooms with no hints connecting them, also with 3-5 appearing together in the sanctum. Or am I reading it wrong and either 4, 5, or 6 would lead to the vault? I’m also not sure how to guide the players towards patterns having a different number of constellations in each. I guess the amphisbaena can say it directly, but maybe if running this, I might want to think of a way to standardize the portal addresses, and have more hints for the portal addresses.