Michelle followed the directions from the obsidian key.
Sid.
Kruger intimated the key spoke to him, but she felt no such presence; it did have a tether. The thread of magic took her to the western cliffs. The treacherous climb shifted at the faintest wish for an easy assent, until she landed on small ledge approximately a hundred feet above the ocean. A small gap, no wider than her thumb, faintly resembled a key-hole. As practiced before, she bare her soul to the tower while placing the key within.
And the ground rumbled.
What once was hidden from all others now stood clearly visible as the tower emerged from the mountainside.

Credit: Yevgen Gozhenko, ArtStation