"This is a secret of the Shadow Tower, and I haven't gathered much information about it yet. However, I speculate it might be related to the Holy Spirit Flower."
The Holy Spirit Flower, a transparent blossom, remained unseen during the day, yet emitted a gentle glow in the nighttime. Under the moon's illumination, it appeared nearly imperceptible.
Delicate and uncommon, its blooming window was extremely brief, enduring merely an hour. Despite its fleeting presence, it possessed a purifying influence.
In regular circumstances, the Holy Spirit Flower's brief blooming duration was a factor in its rarity.
Employing hidden methods to prolong its flowering phase presented a different challenge altogether.
The space behind the Boundary Wall was filled with toxic mist, and only those carrying the Holy Spirit Flower were immune to it.