Whether it was a blessing or a curse would depend on whether the spirit energy supplied exceeded what the cultivator could tolerate.
For example, after Perfected Xuanchen broke through to the peak of the Seventh Heaven of Yin Yang Perfected Lord, his body was unable to tolerate any more spirit energy. That was his limit, but if he was forced to continually absorb spirit energy for further breakthroughs, he would explode and die.
"Grandfather…"
When little You Yun saw how pale Perfected Xuanchen was, she thought that she had done something wrong. She pursed her lips, and her eyes were misty with self-reproach.
"Little You Yun is a good girl… Grandfather is fine. Grandfather is so grateful to little You Yun…" Perfected Xuanchen's eyes were emotional. He had never imagined that he could become a Yang Lord in this lifetime.