Nice Idea... about the NPC.... i would not set "real nightingales", but helpers (consecrated allies)... a mage who help translate forgotten languages like Enthir from the Questline. one own trader for the mhm things i found on my way :-) 1 or 2 Members from the Thiefguild who work as "scout" outside and sleep in a tent near the entrance? inside maybe 1-3 "trusting" thiefs (the next generation who has to study and practice before become nightingale) "Is this just an oversight about the Nightingales, and now they aren't really that secret anymore?" <--- i think the Thiefes now believe more an nocturnal, but it has nothing to do with open the secret of nightingales for everyone... its only a shrine for the god of luck smile, nightingales still are a mythos.