"However, the netherworld instrument thousand cry you've learned often incorporate spirit power and dark nitrate substances when used, sometimes even embedding other gems to better control their direction and explosive power, such as the upgraded version of the Ghost Shuttle — the Hell Ghost Shuttle and the Golden Revolver."
Xin spoke evenly, using familiar examples to bridge the gap between what they already understood and what he was about to reveal. His tone remained instructional, but there was a subtle shift—this was no longer basic knowledge, but something that approached the frontier of innovation.
"Although these artifacts are extraordinary, they are only slightly more effective than ordinary Hidden Weapons, and can be considered the rudimentary version of the concept Teacher is about to discuss."
Zhu Zhuqing and Meng Yiran listened intently. What they had once considered advanced suddenly felt incomplete, like stepping stones toward something far greater.
"And this Soul Bursting Sky Piercer that Teacher is about to introduce to you truly transcends the concept of Hidden Weapons. It is a spirit tool killing weapon. Even if an ordinary enemy knows you are going to use it, it will be very difficult to counter, and they will only be filled with awe, because it only requires a minimal amount of spirit power as a medium to activate its switch, yet it can unleash power capable of instantly killing a Spirit Douluo and severely wounding a Titled Douluo expert."
The room fell silent.
The scale of what Xin described went far beyond anything they had imagined. Instantly killing a Spirit Douluo? Severely injuring a Titled Douluo? These were existences that stood near the peak of the Spirit Master world.
For a moment, even their breathing slowed.
Teacher Xin's words refreshed Zhuqing and Meng Yiran's worldview. Instantly kill a Spirit Douluo? Severely wound a Titled Douluo? What kind of destructive power was this?
And there was a new term: spirit tool killing weapon.
This was something they had never heard of.
"Teacher, what is a spirit tool killing weapon?" Meng Yiran couldn't help but ask.
Xin nodded slightly, as if expecting the question.
"Humans possess strength and used the relationship of force to create Hidden Weapons. Then Spirit Masters should also have equipment that matches them — spirit tools. Most Spirit Masters nowadays only see the spatial storage properties of spirit tools and use them as storage bags."
There was a faint trace of dissatisfaction in his voice, though it was restrained.
"But I call these artifacts, which are driven by spirit power and utilize energy substances like spirit tool gems to unleash terrifying explosive power, spirit tool killing weapons."
He gestured toward the massive black weapon before them.
"And this Sky Shattering Cannon is an eighth-level spirit tool killing weapon."
The designation alone implied a structured system—levels, classifications, perhaps even an entire discipline yet to be fully explored.
"Although the Sky Shattering Cannon still needs optimization, it already possesses terrifying propulsive force. Consider it a self-defense weapon that I, your master, am giving you for your trip to Star Luo this time."
Zhu Zhuqing's gaze tightened slightly. A "self-defense weapon" that could threaten a Titled Douluo—her teacher's standards were truly on another level.
"The method of use is very simple: just load it, insert the corresponding size of profound iron steel sand, activate it with spirit power via the trigger, aim at the target, and it can crack a person's soul and shatter their skull!"
Bang—
Without warning, Xin demonstrated.
The deafening sound shattered the stillness of the pavilion, echoing off the walls like thunder. The recoil was violent, forcing even Xin's steady stance to absorb a noticeable backward force.
The target was a slab of profound steel, nearly twenty centimeters thick—material typically reserved for high-level training. Even Ning Rongrong, with her strength-enhancing techniques, struggled to leave a visible mark on it.
Yet now—
The surface was riddled with dense impact marks.
Each indentation drove deep into the metal, clustered tightly together, as if a storm of steel had struck in a single instant. The sheer penetration spoke of overwhelming force, far beyond conventional Hidden Weapons.
Zhu Zhuqing and Meng Yiran's eyes widened in shock.
Neither of them spoke.
They didn't need to.
If such an attack landed on a human body… the result would not simply be injury—it would be annihilation.
"However, this item has considerable recoil, and each loading only allows for five shots. Zhuqing, you must remember this point."
Xin's tone returned to calm instruction, as if the devastating display had been nothing more than a routine demonstration.
"Meng Yiran, this is why Teacher brought you along. Teacher knows you always enjoy studying these kinds of artifacts, so the next stage of your learning plan that Teacher has set for you is to personally create a Soul Bursting Sky Piercer."