Xū is a young disciple that has a truly unique spirit root, "『 』", which makes him highly sought after by those who understand its power. To stay hidden and safe from those who might want to use him or eliminate him, Xū joined a martial sect as a student, blending in with the other disciples.

On the surface, Xū seems laid-back, lighthearted, charismatic and a bit of a joker. However, beneath this, he has a sharp, scheming side, always thinking a few steps ahead.

Xū's ambitions stretch far beyond personal gain or survival. His ultimate dream is to challenge the very foundations of existence by ending the reign of the heavens themselves. Though his cultivation revolves around erasure, he views it not as a force of destruction but as a means to create something new: a world where suffering, pain, and despair are erased, leaving behind only a true, blessed existence. Xū believes that through his path of "『 』", he can carve out a future where the burdens of the old world no longer exist, replaced by an existence defined by freedom and fulfillment.

**Qi Cultivation Technique:** 
***"N/0"*** *(零炼诀)*
The "N/0" technique is an unconventional approach to qi cultivation, focused on subtraction rather than accumulation. Instead of gathering and refining qi to expand his inner world, Xū's method is about slowly unraveling his own qi, piece by piece. The process involves meditative states where he learns to release and dissolve his qi into "『 』", an absolute absence.

For a disciple, the technique is still rudimentary; the dissolution is slow, and control is limited. The effect is that Xū's presence and qi signature become faint and indistinct, often confusing opponents who sense an eerie emptiness rather than a cultivator's usual energy. While he hasn’t yet reached the point where his inner world is a complete void, Xū’s qi has an unpredictable and hollow quality, making it harder to pin down or counter.

The primary benefit of "N/0" at his level is that his energy feels like it lacks form, creating an unnatural, slippery sensation that disorients foes who attempt to gauge his strength or intent.

**Body Tempering Technique:** 
***"Empty Vessel"*** *(空载诀)*
The "Empty Vessel" technique is a body tempering art that focuses on removing the natural limits of Xū’s physical form rather than enhancing it. At his current stage, Xū has only started shedding the basic constraints that govern his body’s physical laws. His flesh, bones, and muscles feel "hollowed out," giving him an odd, unpredictable lightness or heaviness at different moments.

While this technique does not grant him overwhelming strength or resilience directly, it makes his physical capabilities hard to predict. His strikes may land with unnaturally sharp force for one instant, and in the next, he moves with a lightness that defies normal momentum. His body feels detached from common sense; however, he must carefully manage the strain it puts on his undeveloped form. Overuse could cause his body to "over-dissolve," leading to serious consequences.

**Soul Refining Technique:** 
***"Soul Dispersion"*** *(魂散诀)*
"Soul Dispersion" is a nascent soul-refining technique where Xū has begun to unravel his soul’s essence within "『 』". For a disciple like Xū, this technique is still in its early stages. His soul is partially intertwined with the void, which grants him an uncanny resistance to soul-targeted attacks or techniques. To spiritual senses, his soul feels thin and scattered, as if only half-present.

At his current level, "Soul Dispersion" makes it difficult for enemies to gauge his spiritual strength or directly attack his soul. However, Xū's control is not perfect; his soul still flickers between presence and absence, and the technique requires immense focus to maintain. If he loses concentration, his soul might waver between being too scattered to react or too concentrated, which could make him vulnerable.

###Movement

**Footwork Technique:** 
***"Missing Path"*** *(失踪步)*
The "Missing Path" is a footwork technique that allows Xū to erase the middle part of his movements, creating the illusion of teleportation or sudden shifts in speed, direction, and momentum. At his current disciple level, Xū can use "Missing Path" to great effect over short distances, creating an impression of blinking or jumping across the battlefield without a trace of his intermediate steps.

This ability to "erase" the middle of his actions makes his movements difficult to predict. However, it is not perfect; he requires careful calculation and timing to avoid collisions or overshooting his intended position. Overuse can also cause significant mental fatigue as he must account for the disorienting effects of suddenly appearing somewhere else without the intervening movement. At his current level, the technique is disorienting but still imperfect, with the occasional trace left behind, and it lacks the refinement of higher-level mastery.

###Offense

**Attack Technique:**
***"Vanish"*** (湮灭)
"Vanish" is Xū's fundamental offensive technique that leverages the concept of "『 』" to create small pockets of non-existence. As a disciple, his control is limited, and the size and duration of the voids created are short-lived and unstable. A flick of his wrist can cause localized "holes" in the air or materials, but these voids are small and require precise timing and concentration.

The technique is extremely effective for pinpoint strikes or disrupting incoming attacks by erasing a portion of the energy or object.

**Trump Card Technique:** 
***"End"*** *(终绝)*
"End" is Xū's most potent technique and represents his attempt to harness "『 』" for complete annihilation. As a disciple, his use of this technique is limited to short-range, single-target attacks, and even then, it requires a significant amount of his energy and focus. The attack aims to erase the target from existence, but the scale and control are not yet perfected. It's the ultimate manifestation of Xū's "『 』", a trump card that annihilates the target in the truest sense. This technique exposes the target to the absolute absence, causing them to dissolve into "『 』", leaving not even a trace of their existence behind.

"End" is not merely about destruction; it is about absolute erasure. The target is lost to a void beyond nothingness, and their presence, soul, and memory are erased as though they never existed. The technique is exceedingly dangerous and hard to control, especially if not directed at a specific target. 

If "End" is not precisely controlled, it risks destabilizing the area around the target. For now, it serves as a powerful trump card against single opponents but comes with the risk of significant backlash if not carefully handled.

###Defense

**Life-Saving Technique:** 
***"Curtain Call"*** *(落幕回生)*
"Curtain Call" allows Xū to erase the moment of his death, but as a disciple, the technique is extremely taxing. "Curtain Call" is an extraordinary technique that denies death by erasing its occurrence from existence itself. When Xū faces a fatal blow, he can activate this art to "subtract" his own death, rendering it into nothingness. This allows him to return to life without any lingering wounds, as though the mortal strike never happened and independently of the methods or techniques used.

However, the use of "Curtain Call" is limited. The paradox of returning from nothingness strains the very fabric of existence and can only be performed a finite number of times before the risk of irreparable dissolution becomes too great.

###Auxiliary
***『 』Unbound*** *(未绑定)*
A technique that allows for truly esoteric usage of Xū's abilities, allowing him to affect more abstract notions, like turning previous erasures into nothing, reverting them, or erasing a thought or plan of action that an opponent is preparing. It is, however, the technique he's the least adept with, and so he barely ever uses it.