You throw your footwear at the skull in the mirror, and to your surprise, it knocks the skull into the distance, dissipating almost instantly. You walk through the threshold, find your successful tool, and replace it comfortably on your foot. Looking up, a wide yard is before you.

A small warped fence blocks your path forward, though you could jump over it into the fields yonder.
You can also choose to walk left or right.
You look back, but all you see and feel is a solid stone wall with a drawing of a skull on it.