You were walking along another hallway, grabbing documents and other stuff that you come across. Then a vent pops open and out comes a male voice, “Needing something?”

curiosity got the better of you and you crawled throw the vent. When you came out the other side, there was a angler-serpent-whale-man, “Welcome, I am Sebastian, and here’s how it goes, you see something you like, and give me those documents as payment. Keycard is on the table when you’re ready to continue on your journey.”