A red X.
It was the execution sword of the Death Threshold.
Only by killing Feitan within the time limit would this glaring red symbol disappear.
All the information Morrow knew about the Death Threshold was extracted from this red symbol.
The method of extracting information was simple: just focus attention on the red symbol, and the relevant information would be transmitted into the brain like data transfer.
But before the information transfer, one had to experience an extremely realistic Death Replay.
Before considering a new ability, and before being inspired by Killua's Lightning Speed ability, Morrow had never thought of utilizing the "X".
That's right.
Morrow realized that he might be able to use the "Death Replay" to obtain a kind of ability material.
Thinking carefully now, that indescribable strange feeling from earlier when dodging the sniper...
It was almost like a warning of death.
Now, what Morrow thought of was to recreate that almost ethereal feeling from back then, and then find a way to strengthen its existence.
This way, he could use the concept of death warning as the foundation for a new ability.
Morrow felt this idea was somewhat far-fetched, but he believed it was achievable.
Because Nen was a system full of infinite possibilities.
Abilities like Kakin fourth prince Tserriednich's "Ephemeral Ten Seconds" and Morena's "Etude of Love" were all strange products born from this system.
Morrow focused his attention on the red symbol on the back of his hand.
In an instant, his consciousness was like a small boat swallowed by a vortex, experiencing a moment of turbulence and blurriness.
In just the time it took to take a breath, the Death Replay began, and Feitan's figure appeared before his eyes again.
A slightly distorted body with afterimages, eyes cold and gloomy enough to freeze everything, a thin sword accompanied by raging killing intent...
Before he could see more clearly, the next second was the sensation of the blade slicing open his face.
The feeling of suffocation, of death gripping his throat, came back multiplied.
Unable to breathe, darkness descended.
The next moment,
Morrow's consciousness returned to reality, unconsciously reaching out to press against his face, his eyes trembling slightly beyond his control.
The Death Replay brought out by the "X" was completely like making him "die" again.
Fortunately, Feitan's blade was fast enough that after the slash, there wasn't much actual pain felt.
It was mainly because the Death Replay was too realistic, but this was also indirectly allowing Morrow to touch the breath of death.
One more time...
Morrow calmed the palpitations in his heart and once again focused his attention on the red symbol.
His consciousness went from spinning to shaking, from blurry to clear...
Feitan's figure appeared again.
A flash of sharp blade light, endless darkness descending.
Morrow's consciousness returned to reality once more.
Again.
The Death Replay started once more.
"Rumble!"
Lightning flashed outside the cave, followed shortly by pouring rain.
The sound of rain arrived in a jumble, but it didn't affect Morrow in the slightest.
One Death Replay after another allowed Morrow to gradually recapture that strange feeling from before.
Correspondingly, Feitan's face became increasingly detestable.
If it weren't for his still insufficient strength, Morrow would really want to go directly confront Feitan.
Time passed.
When the heavy rain stopped, the first ray of morning sunlight shone into the cave.
Only then did Morrow stop the Death Replay.
He couldn't remember how many times it had been, but effort yields results.
The continuous Death Replays allowed him to truly touch death itself in a meaningful way.
But "warning" alone was not enough...
This was just the foundation; more needed to be added.
Although the glowing dandelion could make the birth of abilities easy and simple, what Morrow wanted was a Nen ability that could both target Feitan and suit his own nature.
Warning, evasion, restraint, counterattack... and it must fit the Nen type.
Morrow raised his hand to his chin, recalling his experiences since coming to this world.
He learned observation and discernment in the cunning antique industry.
He realized the importance of integrating resources during Nen training.
He experienced the joy and sense of achievement of narrowly avoiding attacks in the Heavens Arena.
He perceived the importance of "timing" and "effective attacks" in battle after battle.
First is...
Morrow finished recalling and summoned the glowing dandelion, implanting the concept of death warning into it.
The dandelion's light flickered once.
Use the form of warning to enhance the ability to evade attacks.
Continue to extend this as a precondition for restraint.
But to enhance the effect of the ability itself, before extending the restraining ability, a Limitation must be set to prove one's determination.
For example, actively sacrificing or weakening defensive power, using the Limitation of death constantly accompanying oneself like the wind to exchange for corresponding Vow benefits.
When evasion is no longer a problem, it's time to connect to the subsequent restraint.
This is equally important.
Not only to deal with Feitan's speed but also to ensure Feitan cannot escape.
Morrow initially considered a Nen space but quickly rejected the idea.
Emitter-type Nen spaces mostly focus on movement, unlike Conjurer-type Nen spaces which can set up some targeted mechanisms.
If it's just a Nen space ability with simple movement and traversal capabilities, it wouldn't be much help in assassinating Feitan.
Unless he was a Specialization Type, able to develop a Nen space while also incorporating Manipulation, Emission, Transmutation, and Conjuration attributes.
If that were the case, he could recreate an ability like Obito's from Naruto.
Evading attacks by phasing through them, then throwing the target into a Nen space...
But he was an Emitter type.
Abandoning the Nen space idea, Morrow had previously considered developing a high-speed movement ability with Emitter characteristics.
But without matching reaction speed and burst thinking ability, as well as overall body coordination to keep up with aura flow...
Under such harsh compatibility conditions, the most likely thing to happen would be him crashing directly into a blade edge at high speed.
It can be said that this kind of ability could be developed with effort.
But not now.
Morrow's time was limited; he needed to consider integrating all current resources and using them to the fullest.
So the ability direction he chose was built on the framework of "killing Feitan".
Not focusing on Nen space or high-speed movement abilities, but still needing to counter Feitan's speed.
Morrow's thinking wasn't fixed; although the direction was restraint, it didn't necessarily have to follow the literal meaning.
What was the original purpose of restraint?
To inflict effective damage on Feitan, for certain!
So Morrow naturally thought of directional attacks.
The foundation and framework of the new ability were thus formed.
Sacrificing or weakening one's own defense in exchange for an ability with ultra-high-speed feedback from warnings would be a Star Ring that allows aura to spread outward.
Using high-risk attack evasion as a precondition to exchange for a directional counterattack ability would be a Star Mark that can be placed on the attacker.
The framework of the ability was roughly like this.
The key point was that Nen abilities developed with upgrade rewards wouldn't occupy Nen capacity.
This meant that even if Morrow used this skill slot on Feitan, he would still have the capacity to develop other abilities he wanted in the future.