Hi, This is the last video of Atelier Ryza from me. You can find this Secret Boss in Lv.90 Underworld Bottle. And you need to defeat it for "True Queen of Shadows" trophy. For anyone who has a trouble to find this Secret Boss like me. You can use the code at the beginning of the video. Thanks to "Replekia" in this board for the code https://gamefaqs.gamespot.com/boards/264904-atelier-ryza-ever-darkness-and-the-secret-hideout/78138008