The abandoned house of wisdom- not!
Solomonic Storytelling 30
Through expenditure of vis and the instruction of a sahir, a structure comes to resemble a boarded off and decrepit place. The sahir who casts this spell can concentrate at sunset to make it as if the place somehow undesirable to squatters (such as adding slightly concealed faces to the windows, or having dangerous animals seen sleeping through the windows). Gifted sahirs are known to take up abandoned buildings in Baghdad with this spell, often employing a spirit if they are able to cast this spell or commissioning greater bindings with this spell. Against a Perception+Awareness roll of 12, someone could see through this illusion.
(Base 20, +2 Ease factor)