"Soul Storage Vessel? It sounds like a very mysterious item, a jar that stores souls; it feels like something an Evil Magician would concoct."
Liszt pondered.
Anything related to the soul is never devoid of evil.
Previously, during the great battle with the Ghost Ship, he had obtained the Soul Submerged Wood from Curtis Truth, tainted with the resentment of countless people—after all, it was made through the sacrifice of an entire ship's crew; the Soul Disturbing Agent obtained from Merlese Truth was also extracted from the blood of the dead.
The triangular theory of magic power, materials, and spirit inherent to magicians naturally pushes them toward the exploration of the spiritual realm—the soul.
Liszt, too, wanted to know the meaning of the soul, but he was more keen on living a comfortable life.