Su Xiao's strongest and most practical soul-based ability was probably this "Soul Inscription." It seemed to be a benefit corresponding to 20 points of soul strength, and should have been the worst of the ten benefits in the Soul Treasure Chest. In reality, that wasn't the case.
The Soul Treasure Chest had been prepared by the First Era's overlord faction, the Soul Bell Tower, for "Inheritance-level" soul warlocks. The key lay in those words: "Inheritance-level."
An Inheritance-level candidate was one of the candidates to become the next leader of the Soul Bell Tower—the Tower Master. To cultivate an heir of this level, none of the ten items in the Soul Treasure Chest could be treated carelessly. The first item in particular had to be a secret treasure or ability with a low usage threshold that could be used for a lifetime. "Soul Inscription" was precisely such an ability.
Soul Inscription: Lv. EX (Soul-based · Basic Passive)
Prerequisite: Soul strength must reach 20 points, and "Soul-based · Basic Passive" must not yet be mastered.
Skill Effect: All inscriptions and spell formations you create will use soul strength as their basic attribute. In other words, all such actions will receive the "basic bonus" of soul strength.
What exactly were inscriptions and spell formations used for? Based on Su Xiao's personal ability system, inscriptions corresponded to "contract formulation," while spell formations corresponded to "Sealing Technique" and the catalytic process in alchemy.
Put more simply, contract abilities, sealing, and alchemical catalysis all received bonuses from Su Xiao's mental power, which was related to his Intelligence Attribute.
The bonus to contract abilities was: Own True Intelligence Attribute ×0.35.
The bonus to sealing was: Own True Intelligence Attribute ×0.68.
The bonus to alchemical catalysis was: Own True Intelligence Attribute ×0.52.
Now, as long as he