Althedeus

The last name uttered from Barnom Slim, the Lich King’s mouth before his body was consumed by the shadows. The entity, in whatever form and by whatever name, is believed to be the dark force once behind Grishom Stone and now rumored to be behind Elithain Cross. Many believed this mystery creature to be the source of all of Wehnimer's Landing troubles and chaos during Cross Into Shadows.

Althedeus was "undone" by the Palestra Blade Aralyte and adventurers in the shadow realm after Aralyte used an Ithzir staff to open the way through Lake Eonak while others simultaneously destroyed the urnon golem host the shadow was hoping to possess.