Even though there were only three cargo trailers in place, their length and height would require considerable time to fully cover them with the earth wall.
After an hour, Vulture and the others finished covering the three cargo trailers, just in time for Aston and his team to arrive with another three.
Their goal was to completely erect all ten cargo trailers that Sparrow's team had brought back.
The reason it took Vulture and his team an hour to complete their task was that they alternated their efforts to fully recover and avoid depleting their spiritual energy, as Kisha had advised.
Whenever they felt they were nearing their limit, they would step back, allow the others to take over, and return once they had rested.
Kisha's presence significantly accelerated their recovery, but it still placed a strain on their mental stamina.
Nevertheless, they persevered as the sky gradually turned a deep crimson and a cold wind began to blow.