Duan Ling Tian had already mentally prepared himself for his ascension. Since Yun Qing Yan appeared and imprisoned his family and friends to force Ke'er into leaving with him, he had also been yearning to ascend to the Devata Realms. After all, he could only save Ke'er, his family, and friends once he ascended to the Devata Realms.
Naturally, Duan Ling Tian knew he would not be able to save his loved ones as soon as he ascended to the Devata Realms. However, at the very least, his cultivation base would have a breakthrough, and he would become a true Celestial. In the mundane realms, his cultivation base had reached its limit when he became an Eminent Celestial.