Terraken

The Terraken is a giant undead Dragon Turtle, originally created by the nation of Cheliax, capable of untold death and destruction. It is borderline mindless and only driven by a need to destroy, unless controlled telepathically by a magical necklace. It's last reign of chaos was ended by Pelastour who trapped it in a deep Oubliette under Chimera Cove, where until recently it was guarded by a large water elemental.

It seems likely that the form of undeath upon the Terraken is very similar to that of its crew (or more likely handlers), such as Vintresk - when dry and without water, or possibly slain outside of it, the zombie entered a dormant state, but will heal again upon further contact with the liquid. (This is slight conjecture, but one assumes that if it was originally trapped, it was probably hard to kill outright) Apart from that, it also possesses the abilities of a formidable dragon turtle - corrosive acid breath and extreme strength, capable of rending ships and even stone to pieces.

The Hunted were forced to free the Terraken after being attacked by its water elemental guardian during an encounter with Poltur. During session 22, Tharin encountered and eventually controlled the thing, releasing it from its oubliette in Chimera Cove, and as of session 23 still possesses the amulet.