Wardstone

The Wardstones were once great Artifact Obelisks that were erected to contain the Worldwound and halt its expansion. While they were active, the Wardstones provide a massive Forbiddance effect that prevents Demons from teleporting into the area, or teleporting across the border created by multiple Wardstones being erected around a border area. They were created using the power of Iomedae and her avatars, and are infused with divine holy energy. After the First Mendevian Crusade, a series of these obelisks were constructed in secret to contain the Worldwound, when the discovery was made by the demons that these Wardstones were being constructed, and Drezen fell, the Second Mendevian Crusade began, and ended with the completion of the Wardstone barrier.
During the Fourth Mendevian Crusade, Khorramzadeh, the Storm King chipped one of the Wardstones, but such an action severely damaged the Storm King, and, in the ensuing battle with Terendelev, he was grievously wounded forcing him and his demon armies to retreat, effectively ending the Fourth Mendevian Crusade.
On 16 Arodus 4713, Khorramzadeh successfully infiltrated the Kite and destroyed the Wardstones with the help of the Templars of the Ivory Labyrinth and defeated Terendelev. After the destruction of the Wardstone at Kenabres, a fragment of the Wardstone was moved to the The Grey Garrison by having Minagho grant a wish to Jeslyn.
After the party raided the Grey Garrison, and the party destroyed the Wardstone Fragment with the Rod of Cancellation, which discharged all of the other Wardstones placed at other towns around the Worldwound. Such an act destroyed all of the demons nearby the Wardstones, but also permanently discharged the Wardstones, making them useless hunks of rock. Such power infused the party and turned them into Mythic Heroes.

Minor Artifact - CL 20th
An erected wardstone that is firmly mounted in a place of prominence creates a 300-foot forbiddence effect around the wardstone that is attuned to damaging chaotic or evil creatures. When two wardstones are erected, it creates a line of teleportation blocking similar to dimensional lock except that it only prevents teleportation across the line between the wardstones. It does not prevent any teleportation effects from one side of the border to the same side of the border. When enough wardstones are erected in a circular format around a large area, it creates a circular barrier that prevents the encroachment of demonic energies across the barrier.

Item type

Unique Artifact

Destruction
The wardstone is a powerful artifact, and must be maintained once a year using powerful magics. If this ritual is missed, it can be damaged like any other object, but it has a Hardness of 30 and 500 Hitpoints. A wardstone linked to create a barrier creates a gap in its effect.