This black iron neckpiece grants an evil wearer a +2 profane bonus on all saving throws.
Good-aligned creatures within 120 feet of the choker of the beast hear distant bellows of unimaginable rage, giving them a –2 penalty on all Perception checks as the sounds distract them. Within 30 feet of the necklace, the sound increases, and all good-aligned creatures must succeed at a DC 18 Will save or be shaken while within range. They can attempt another save after 24 hours.
If the wearer willingly breaks the choker in half (a full-round action), the ground under his feet ruptures open and consumes him (as the imprisonment spell). The blood of the beast seeps up from the wound in the earth 1d6 rounds after the wielder is consumed. Treat this as a fiendish carnivorous blob that attacks any living creature within sight. The hole seals immediately after the blood rises.
Pathfinder Campaign Setting: Inner Sea Combat © 2014, Paizo Inc.; Authors: Dennis Baker, Jesse Benner, John Compton, and Thurston Hillman.