Immortal Soldier Pills were also divided into several grades, allowing the souls of Immortal Realm people at different realms to have their flaws repaired.
Low-grade, mid-grade, high-grade, and supreme-grade—these were the grades of Immortal Soldier Pills.
A low-grade Immortal Soldier Pill could repair the soul of a Human Immortal Realm soldier up to the Earth Immortal Realm.
In other words, as long as one possessed enough low-grade Immortal Soldier Pills, a Human Immortal Realm soldier could be raised to the Earth Immortal Realm.
A mid-grade Immortal Soldier Pill could raise an Earth Immortal-level soldier to the Heavenly Immortal Realm.
A high-grade Immortal Soldier Pill could raise a Heavenly Immortal-level soldier to the Mysterious Immortal Realm.
As for supreme-grade Immortal Soldier Pills, if there were enough of them, they could completely make up for the flaws in a soldier's soul, allowing them to advance to the Golden Immortal Realm.
However, Immortal Soldier Pills were not the pills Qin Shaofeng had in mind, because even low-grade Immortal Soldier Pills required Heaven-grade mid-grade spiritual medicine to refine.
That was far too uneconomical.
Qin Shaofeng instead intended to refine a pill called the Soul Nurturing Pill.
This Soul Nurturing Pill had effects almost identical to those of the Immortal Soldier Pill, and it too was divided into four grades: low-grade, mid-grade, high-grade, and supreme-grade.
Moreover, the effect of every grade of Soul Nurturing Pill in repairing soul flaws was even slightly better than that of Immortal Soldier Pills.
Most importantly, the medicinal ingredients needed to refine Soul Nurturing Pills were nowhere near as advanced as those required for Immortal Soldier Pills.
Low-grade Immortal Soldier Pills required Heaven-grade mid-grade spiritual medicine to refine.
But Soul Nurturing Pills could be refined with merely some Earth-grade spiritual medicine.
Even Mid-grade Soul Nourishing Pills could be refined using