The Elf Race was of particular interest. The information Xu Yunfan had gathered suggested they were ageless and immortal, a fact that naturally piqued his curiosity.
Only after a Golden Core True Monarch reached the Mid-Stage and could sustain a Grotto Heaven, keeping it suspended high without it falling, could they achieve a form of Longevity. This allowed them to undergo endless Reincarnation without any loss of personal power.
Otherwise, even an Early-Stage Golden Core cultivator who failed to break through would ultimately see their cultivation fall. While their Innate Wisdom might persist through reincarnations, returning to the Golden Core Realm after several lifetimes was an incredibly arduous task.
Once he had squeezed out the last drop of valuable information, Xu Yunfan tossed the thoroughly "re-educated" Delis aside.
'Good thing his Dharma Body can change size at will; otherwise, he really wouldn't have been able to take it.'
