Bloodstained: Ritual of the Night/Livre Ex Machina

Library
Below the warp room is a library that is overseen by a vampire named Orlok Dracule (O.D.). Books can be borrowed and returned. If you go to the room below O.D. with the Invert shard, you can use it on the small opening in the ceiling to launch O.D. up in his seat. This gag is a reference to a similar one in Castlevania: Symphony of the Night. When you go back down, a chest will appear with the Nose Glasses inside.