Casio suddenly shuddered, akin to the relief of a trekker who, having endured long hours, finally has the chance to relieve himself. This feeling burst into his brain, every pore of his skin sprung upright, carrying an intense wave of joyous sensation.
He couldn't shake a sense of déjà vu about his current situation. After some pondering, Casio remembered the feeling, it was the same as when he used the Wisdom Rune's Spirit's Blood. However, the stimulation brought on by the Pure Black Magic Water was far less than that of the Spirit's Blood.
Casio still remembered his visceral reaction to the Spirit's Blood — such a powerful sensation it felt as if he had been baked in a furnace. By the end, when the Spirit's Blood reached his brain, it was a thunderclap. He bled crazily from his eyes, nose, mouth, and ears.
Or rather, he bled from all his seven orifices.
If the Spirit's Blood was an extremely turbulent river, then the Pure Black Magic Water would be a slow, meandering stream.
