OOC: So if the book is somehow destroyed, are the seals "opened?" Also, since Stanth knows the process of opening a rift (through the relationship with Zan's Midnight Assassins, though Rift Magic is undesirable for Stanth's purposes), so I'm assuming that you mean that Stanth doesn't understand how it works, even if they know how to work it.
IC: Of course, there was a problem by finding the artifact by wanting it. Assuming that it was powerful (and it probably was, otherwise Selsträ wouldn't be longing for it), if Selsträ let too much of its power into herself, there was a chance that it could steal Selsträ's mind if she got close enough. Not that it mattered, because it felt like she was never going to get close.
IC: Of course, there was a problem by finding the artifact by wanting it. Assuming that it was powerful (and it probably was, otherwise Selsträ wouldn't be longing for it), if Selsträ let too much of its power into herself, there was a chance that it could steal Selsträ's mind if she got close enough. Not that it mattered, because it felt like she was never going to get close.