Flande was shocked; it was actually a Soul Bone. As a Soul Saint, he naturally understood the power and rarity of Soul Bones.
Ye Yu's White Bone Mask looked similar to the Celestial Void Power Demon Bull's, but not completely the same. The Celestial Void Power Demon Bull's mask was plain, while Ye Yu's had three dark red stripes extending from the forehead to the center of the brow, and two more stripes running from under the eyes to the sides of the nose.
Admittedly, Ye Yu's White Bone Mask was very similar to Ichigo's Mask of Voidification from the God of Death...
Tang San was curious, "Teacher, what is an External Soul Bone?"
A new unfamiliar term piqued Tang San's interest.
From the surprised and excited expressions of Master and Flande, Tang San could guess that this External Soul Bone must be very powerful.
Master suppressed his excitement and explained, "A Soul Bone is a very special item, something every Soul Master dreams of possessing. Soul Bones are similar to Soul Rings as they both originate from Soul Beasts, but they are different from Soul Rings. Every Soul Beast can produce a Soul Ring, but Soul Bones appear at a chance of one in a thousand or even lower. For a Soul Bone to appear, special conditions must occur when the Soul Beast dies. If a hundred-thousand-year-old Soul Beast is hunted, it will definitely drop a hundred-thousand-year Soul Bone."
"Soul Bones differ from Soul Rings in many ways. The Soul Ring must be absorbed by the person who killed the Soul Beast, but there are no such restrictions with Soul Bones. They can be used personally or sold. Any piece of Soul Bone, even the most ordinary, is priceless."
"Soul Bones are divided into six categories: Skull, Torso Bone, Left Arm Bone, Right Arm Bone, Left Leg Bone, Right Leg Bone. The strongest is the Torso Bone, followed by the Skull, Left Arm, Right Arm, Left Leg, and Right Leg. Soul Bones from Soul Beasts under ten-thousand years have only one skill, while those from hundred-thousand-year Soul Beasts have two skills. Once a Soul Bone is absorbed, it cannot be separated from the body unless the host is killed, causing it to drop automatically. However, a Titled Douluo can extract Soul Bones on their own, at the cost of reducing their Soul Power by ten levels, which no one would willingly do."
"Since a Soul Bone becomes part of the body, some Soul Power is integrated into it, so removing it results in a decrease in strength."
Master looked at Ye Yu's White Bone Mask excitedly, "However, Xiao Yu's Soul Bone doesn't belong to these six categories. It cannot be said to be a Head Soul Bone, but rather an External Soul Bone."
"External Soul Bones are rarer than ordinary Soul Bones, with an occurrence rate even less than one in ten thousand. The preciousness of External Soul Bones can rival that of top-tier Soul Bones. In the Soul Master Realm, there's a list of dreams for Soul Masters, the precious items they dream of obtaining. Among them, External Soul Bones rank second, while the first is the extremely rare, almost impossible to obtain, hundred-thousand-year Soul Ring."
"The ability for Soul Bones to grow is even stronger than Soul Rings. For instance, Xiao Yu's Soul Ring has supportive boosts that increase with the accumulation of Soul Rings, but the boost from a Soul Bone is even stronger."
Hearing this, Tang San was also shaken and found it reasonable. Given the rarity and preciousness of Soul Bones, their abilities naturally surpass the Soul Techniques of Soul Rings.
Master continued, "Soul Rings are limited by their own age, but Soul Bones are not. They evolve with the host's increase in Soul Power. The earlier one obtains a Soul Bone, the better, as it allows more time for evolution."
Master could feel the enhancement in Ye Yu's Soul Power after half his face was covered with the White Bone Mask, and it made him seem more violent, emitting a chilling aura, unable to control his emotions as if in a berserk state gradually losing rationality.
Ye Yu's right half of the face was covered by the White Bone Mask, the left half was not, and his left eye was normal.
The contrast was clear; the left eye was clear while the right eye appeared coldly fierce, making people shiver with fear.
"Xiao Yu, what kind of Soul Skill did you acquire? Is it a Soul Skill that increases Soul Power? Also, should it have a limiting effect?"
Ye Yu nodded, "Yes, wearing the White Bone Mask affects your mind with evil qi. One's emotions become violent, the dark side of the heart is magnified, and any hint of hatred or anger is amplified. Although the White Bone Mask could cover the entire face, I only cover half for now because complete coverage would cause a total loss of reason and a relentless urge to kill."
"Covering half of the face still allows me to barely maintain some sanity. With my current power, the mask covering half of the face can last for three minutes. I named this mode of facial coverage with the White Bone Mask, Voidification."
Flande nodded, "Voidification, like the Celestial Void Power Demon Bull, this Soul Bone possesses its greatest ability, which is the increase in Soul Power. Xiao Yu, I can feel your Soul Power has increased by one level."
Ye Yu nodded, "Yes, half-face Voidification increases Soul Power by one level, complete Voidification by two levels. Although the increment is capped at two levels and doesn't increase as my strength grows, but..."
At this point, excitement and enthusiasm were unconcealed on Ye Yu's face, "But, at any level, it can always increase by two levels!"
Hiss!!!
Upon hearing this, Master, Flande, and Tang San all gasped in shock!
An increase of two levels might not seem much, but to be able to increase by two levels at any strength! That means the stronger the power, the more terrifying this ability becomes!
Think about it, if one reaches level eighty-nine, completing Voidification to increase by two levels would reach ninety-one! A Level 89 Soul Douluo would suddenly possess the power of a Ninety-First Level Title Douluo!
Flande exclaimed, "What a terrifying ability. There is a vast difference, a huge chasm between a Soul Douluo and a Titled Douluo. An eighty-nine level Soul Douluo finds it as hard as scaling the heavens to reach ninety. This is why Titled Douluo on the continent are so few and far between. And for a Titled Douluo, each level up is extremely difficult, the power gap is substantial. And Xiao Yu's External Soul Bone has an ability that can raise the level by two regardless of the current level, truly an incredibly terrifying ability!"
The more Flande thought about it, the more shocked he was, unable to calm down for a long time.
This ability indeed left Master and the other two increasingly astounded while feeling joyous that Xiao Yu acquired such a formidable ability.
Just as Master, Flande, and Tang San were in awe, Ye Yu's next words left all three momentarily stunned, each feeling a shock in their hearts!
"Teacher, perhaps it's because the Celestial Void Power Demon Bull at full strength reaches the Ten Thousand Years Level, so the ability of this External Soul Bone's Voidification Mask includes two: one is the Soul Power boost, and the other is..."
As he spoke, under the increasingly horrified gazes of Master, Flande, and Tang San, two Soul Rings emerged around Ye Yu, swirling around him.
The first Soul Ring was purple and appeared brighter than before. When the second Soul Ring emerged, the three of them widened their eyes!
Because the second Soul Ring was not the brilliant purple, but it had turned into...
Black!!
The trio was shocked to the extreme, eyes wide open, unable to believe it.
"This...this is...a Ten-Thousand-Year Soul Ring!"