One of the Precious Figurines, The Agate Leviathan was found in the Dragon Temple treasure room at Wyrmroost. It becomes a colossal leviathan when placed in the sea, if the activation spell is spoken.
Seth finally activates the Agate Leviathan, revealing its massive true form to be akin to a large whale. He enters its mouth so it will transport him to New Zealand, the location of the Titan Valley dragon sanctuary.
Upon entering into the Leviathan's mouth it is revealed that it also possess a resident Hermit Troll who similar to the Leviathan was rendered into an inert and suspended animation state until he was awakened along with the beast by Seth.