Shaer directly grasped the key point: "Although devils love to toy with human souls, they lack creativity.
An alchemy potion, for example, is not something they could fathom independently.
To study such a potion to the extent where it genuinely enhances a human's mental sea, it would consume human souls on a colossal scale.
Only when they make significant progress would they use a mage's soul as raw material... that's something precious, losing one means there's one less."
Hill looked at Shaer in confusion: "Don't devils have the Old Witch?"
"You don't think that just because they can produce high-ranking devils, their alchemy skills are impressive, do you?" Shaer chuckled, "That's because the raw materials are not only precious but must be voluntary... most importantly, devils are inherently capable of reaching that level, but they can't accomplish it in a short period with their own power.
Even so, only devils at a dead-end would willingly accept the Old Witch's bind.
