One of the Alder Folk of Tir Na Lia, Eredin was named leader of the Wild Hunt by King Auberon Muircetach and spent centuries leading his Red Riders across the skies of numerous planets in search of slaves to capture and bring home. The character Eredin Bréacc Glas plays a critical role in the world of The Witcher, both in Andrzej Sapkowski's literary explorations and CD Projekt Red's video game series.