A guide is available for the Night Aspect boss in a game, with a focus on defeating Heolstor, the Nightlord. The boss is part of a larger set of challenges, possibly including 119 bosses and mini-bosses, and may be one of multiple Night Lords that can be defeated in a specific order. Heolstor, the Nightlord, is reportedly the final boss in the Nightreign section of the game, specifically in the Elden Ring.