Mirage Rise

Mirage Rise is a sorcerer’s tower in the valley southwest of the Minor Erdtree on the Altus Plateau, and it has a fun trick: when you walk up to it, it simply disappears.

To bring it back, you need to find and break three phantom crests in the area. An imp statue nearby gives you the Mirage Riddle, a little map that shows where they are. Spectral imps keep appearing around each crest until you break it. Inside the restored tower wait the Unseen Blade and Unseen Form sorceries.