The divine will Phantom Spirit was the crystallization of mental force, which Bu Fang condensed after acquiring the mental force cultivation technique from the System. He had only recently formed his divine will, so he was not very familiar with its control. However, according to the technique, in addition to releasing spiritual pressure, the divine will could also transmit sounds and enter other people's spirit seas. Bu Fang, however, disdained the use of these tactics. This might be because of his cold character.
When the Wandering Soul Realm Little Saint got a good look at Bu Fang's spirit sea, he was utterly stunned. Was this vast expanse of spirit sea, which seemed to form a world of its own, really a person's spirit sea? No matter how strong a half-step Saint was, his spirit sea couldn't be so vast, could it? Even the spirit seas of Little Saints had boundaries, and if they wanted to improve their mental force, they needed to constantly expand their spirit seas.
