“I remember what I study”
As a librarian, I run into these stamp cards that were used in our library from before 1995. And as a student, I’ve spent quite a few lifetimes also studying on my favorite spot with my favorite stationary. So it seemed like writing a sigil on these cards (including this one, which had been inside a book from 1890) made perfect sense, as the majority of the energy was already there–from all those years nestled between hundreds of books and over three decades of students feverishly studying. So if you happen to stumble by one of these, save it for a future sigil because, according to my boyfriend, it worked wonders for him on his finals.