"This Spirit Pill, is it modelled after the inner core of the Thunder Tiger?" Xu Feng was shocked as he looked at the Spirit Pill in his hand.
In the Dao of Alchemy, using the inner core or essence blood of a Spiritual Beast as ingredients is considered the most advanced operation among Spirit Level Alchemists.
Because even the inner cores from the same type of Spiritual Beasts differ, this leads to extremely high difficulty in alchemy.
Most importantly, to use the inner core of a Spiritual Beast as an ingredient, it must be extracted within a month to ensure that the spirit of the core does not dissipate.
Xu Feng's creation of the Tiger Flood Dragon Pill during his Alchemy exchange also used the inner core of a Spiritual Beast, and the most crucial reason he could do so was because of the availability in the Treasure Vault.
"Junior Brother Xu has keen insight, but this Spirit Pill is still immature; I need to study it for a while longer."