I was in Seclusion for so long that everyone forgot about me

After millennia of solitude, a once-mighty ruler emerges from her self-imposed exile, stepping into a world transformed. Sealed within her vast library—a sanctuary of knowledge and indulgence—she had long been forgotten, reduced to mere myth. However, dwindling supplies of a vital medicine force her to confront the reality outside. What she discovers is startling: her ancient temple lies hidden, a cave conceals the portal to her domain, and a bustling city now thrives where a forest once stood. As she grapples with the unfamiliarity of new magic and strange technology, a mysterious system attempts to process her existence, leading to unforeseen complications.