The reality library is a library located is Austin, Texas that is way bigger on the inside than outside. It has books about every possible thing that could ever exist as well as books on anybody who will exist, who has existed, and who is existing. there are also massive sections titled “history”, “current events”, “futuristic”, and “fiction”. Every time you move a book from one section to the next (EX: take a book titled “viruses” in current events and move it to fiction) that change would be applied to the real world. This SCP is class “safe” as the anomaly is just a normal library besides the fact that you can change reality within. So far the only known instance is the single library in Austin TX. You can also edit the text within books to change parts of a thing. (EX: change when somebody dies or change your birth name). So far this is all I have though of, you can think of more ideas if you want. (I am somewhat new to the SCP foundation so let me know if something like this already exists)