Mysterious Wall

Mysterious walls are walls that only appear in The Minish Cap. Their only purpose is to fuse Kinstones with, which causes another Goron (for the first time the first one just gets stronger) to come and help the other Gorons destroy a wall. If you fuse kinsones with all 6 mysterious walls, you will be able to fuse Kinstones with a Goron. Doing this will wake up Biggoron.