It's very likely that the masters in the Heavenly Cave Blessed Land have not been informed yet; outside, all living forces had already perished.
Therefore, the Great Elder of the Tang Family, who has long been positioned at the boundary of the Blessed Land, could not only cultivate with the overflow of Spiritual Energy from the space but could also report to the masters inside the Blessed Land in a timely manner.
Logically speaking, under such a crisis that might lead to the clan's downfall, the best course of action would be to burn incense in advance and beseech the ancestors to appear, bearing the pressure of heaven and earth, boldly stepping forth to slay the powerful enemy.
Preserving the family's heritage, even at the cost of suffering backlash and a significant reduction in Cultivation, would actually be worth it.
However, when the crisis had not yet arrived, and the matter was not yet certain.
