A treasure used to house and nurture a soul fragment. It prevents the soul fragment from weakening or dissipating over time, and instead nourishes it, allowing it to grow stronger. With special refining techniques, the nurtured soul can be cultivated into a Primordial Soul Avatar, a type of external incarnation. The lamp ensures the avatar remains under control without risk of backlash, and it can potentially be nurtured to become more powerful than the original body.