Those at his level would not want his consciousness and soul to vanish to preserve their centuries of training. Therefore, he needed Adrian's spiritual energy to ensure the stability of his spirit core, facilitating a seamless cycle of reincarnation.

That way, he would be able to unlock the wisdom of his past life in the next life and continue his training.

Adrian's role seemed insignificant, but it was advantageous for someone like the Supreme Master. With the Supreme Master's abilities, th