Ye Xiwen’s heavenly phoenix regeneration was actually a supreme level secret technique. However, the consumption of life essence was something that even the phoenix race couldn’t escape despite being so loved and favored by the heavens, let alone a human expert like him. It was said that at the end of a millennium of its lifespan, a phoenix reached nirvana and took rebirth after completely regaining its exhausted life essence.
Ye Xiwen did not have the miraculous skill of the phoenix race as reaching nirvana was equivalent to dying as a result of exhausting one’s life essence entirely. Life essence is fundamental to maintain the life of all living beings and the so-called process of strengthening the foundation is to find ways to increase the reserve of one’s life essence.