---) Nether Wind Substance: Formed in the dead zone of the Underworld under the nourishment of Yin winds. Upon embedding, it increases the strength of the user's wind powers by two times. The Nether Wind Substance possesses the devouring property, which allows it to break the highest limit of a two-times increase imposed on Low Level substances and reach even higher levels.
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Azrael almost lost his composure after reading the details of the Nether Wind Substance. Fortunately, he quickly regained control and picked up the note within the box, making it appear as if he had gotten the information of the substance from the note rather than from his status window.
"Uncle Oliver, this… is it true that this substance can surpass the two-times increase?" He asked after pretending to study the note for a while.
