Codren's Folly

After traveling from the Shadowfell through Ikthal's portal, Gil'athuil the Tormentor's Shadar-kai army entrenched themselves in a cavern underground near the village of Prosser. Gil'athuil led the majority of their forces north on a campaign to infiltrate the human city of Magnamar. Not long after this, Ikthal Tourín betrayed the Shadar-kai by ripping the soul of Codren the Raven's Tongue from his body, splitting it into twelve pieces and fusing them unwillingly with the portal's gemstones. This act corrupted the portal's fey magic beyond repair and trapped the commander's soul there.

During the Red Rock Campaign, Thorne's Orphans find the site abandoned by the Shadar-kai, protected only by a magic ward that seems to cause The Traveler harm and a swath of homunculi guardians. Once the ward is removed, The Traveler shatters the gemstones and Codren's soul along with them.