Castanics are a playable race in the MMORPG 'TERA: The Exiled Realm of Arborea.' Known for their sharp wit, agility, and striking horned appearance, Castanics excel as skilled artisans and fierce warriors. They are famous for their rebellious spirit and independence, often distrusted due to their mysterious past. Within the series, Castanics play a crucial role as both allies and formidable opponents, bringing diversity and depth to the world of Arborea with their unique culture and abilities.