A crow disguise? How absurd. From the available stuff here, you quickly construct a proper raven disguise and easily blend in amongst the others. It seems this castle stores a lot of hidden knowledge the others here use in secretive, and perhaps even almost occult, ways. This is your chance to learn something that just may help you find your tent again -- which was the whole point of this unexpected outing you're on, if I may remind you. Now, which room will you seek this tent-related knowledge in?