Thus speaking, the World-Ending True Flame is indeed extremely overbearing. However, in the hands of Xuan Xiang, it clearly does not have such power.
As for the Great Mighty Celestial Dragon, it also has a considerable background. The Great Mighty Celestial Dragon is an alien of the Dragon Race, and the first Dragon King among the Buddhist Sect's Dharma Protectors. In terms of status, it is even higher than the Asura King.
From this perspective, the Great Mighty Celestial Dragon Seal is naturally stronger than the Eternal Hell Seal.
From Gao Xuan's view, both are similar in level. The Eternal Hell Seal is more insidious, while the World-Ending True Flame of the Great Mighty Celestial Dragon is more overbearing.
Moreover, the World-Ending True Flame of the Great Mighty Celestial Dragon just happens to counter the filth of the Eternal Hell.
