Stone Shark (Patreon)

Worryingly, you seem to be reaching the book's end and no closer to the information needed. The next creature of note gave you a start when a string of music started playing... seemingly out of nowhere.

Building to a crescendo, you felt inclined to run away. The creature described in the book was truly a strange one... the stone shark? A long deceased sea creature, its bones now replaced with stone, allowing it to swim through the ground at a rapid place.

Underlined in the book were the words, "you thought you were safe on the land?"