The destruction of his sky palace was quite detrimental to him. In this unintentional act of destruction, he had leveled everything from his alchemy room to his bedroom, and even his study. He had kept quite a few notes, scrolls, and books there with his ideas and thoughts on various methods.
Essentially, he placed his legacy here. In the off-chance he died abruptly, those of the sect would find and immortalize these written documents in the Martial King's Dao Palace and other libraries for the future generation. As such, while he was excited about his newfound power over the ambient mana, he was bitter in his heart.
With the utmost haste, he tried to salvage what he could. The entire sky palace collapsed, but there was barely any damage to his records. They were merely dusty and a little worse for wear but intact. After a quick sweep, he was met with the arrival of several members of the sect. They were Prime Imperial Sages and Heavenly Commanders.