Scholomance was one of the instances originally lost to time, receiving a revamp in Mists of Pandaria. The revamp has led to several transmogs and recipes being lost to time and becoming unobtainable. However, in Patch 10.1.5, you’re now able to regain access to the old instance! We went through all the steps to unlock it in this post.
Thanks to the Secret Finding Discord for locating all the steps!