Slash:- Wherever there is light, there is also shadow, and wherever there's a green-clad hero, there's always-

Lion:- A spiky-haired, slant-eyed badass! Well, sometimes. Like Killua Zoldyck, the assassination prodigy from Hunter X Hunter.

Slash:- And Hiei, the Jaganshi swordsman from Yu Yu Hakusho. Before we begin, let's credit those that helped, for the Killua research, and for the Hiei research, as well as for the thumbnail of this battle. That being said, let's determine once and for all, which slant-eyed killer would win in a fight.
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KILLUA ZOLDYCK


Species: Human
Age: 14
Height: 5'2"
Weight: 107.8 lbs.
Occupation: Hunter, Assassin
Classification: Nen User, Transmuter
Theme:


FEATS
Has been trained in assassination since birth
Mastered several killing techniques at a young age
-His family says he has the potential to be the greatest assassin in the world
At age nine, got to the 199th floor of the Heavens Arena tournament
-Was accepted to the 200th floor, but he dropped out
Killed the Great Stamp, the world's most dangerous pig
Killed Johness by ripping out his heart and crushing it
Easily defeated Imori, Amori, and Umori
Opened a 16-ton gate
-With Nen, could open a 64-ton gate
Knocked out Zuchi with a chop to the neck
Defeated many powerful Nen users in the Heavens Arena
Took out hundreds of Hunter applicants with ease
Passed the Hunter Exam in an hour and a half
Helped Gon beat Greed Island
Defeated Youpi, a member of the Chimera Ant Royal Guard
Defeated the Ortho Siblings, a deadly pair of Chimera Ants
Was a key figure in taking down the Chimera Ants
Took down hundreds of military outposts armed with bombs, guns, and tanks, in just a few days

PHYSICALITY



Superhuman Strength
-Can easily tear someone's head into pieces with his bare hands
-Decapitates people and snaps necks with a single swipe of his hand
-Opened a 16-ton gate
-After learning Nen, opened a 64-ton gate
-Easily tore out a man's heart and crushed it with one hand
-Threw a man high enough into the air that the fall would kill him
-Swings around yo-yo's that weigh fifty kilograms at blinding speeds with ease
-Lifts boulders several times his own size
-Cleaved through several trees with one strike
-Tore off a Chimera Ant's head



Immense Speed and Reflexes
-Moves faster than the eye can track
-Can kill his opponents before they even know they've been attacked
-Knocked out more than a hundred opponents in a few minutes
-Much faster than Gon
-Ripped off Rammot's head before he even realized Killua had moved
-Can dodge point-blank gunfire
-Caught a Nen dart thrown at him that didn't exist until it touched him




Superhuman Durability and Endurance
-Took no damage from a kick to the stomach by Imori
-A blow to the neck which can knock out Gon would only briefly stun him
-A bullet could only pierce less than an inch of Killua's muscle
-Slept through being tortured with a whip
-Didn't react to being burned
-Tanked a point-blank explosion
-Can dislodge his joints without feeling pain
-Resistant to electricity
*Was often electrocuted as a child, letting him build up an immunity to it
*It takes several thousand volts of electricity just to hurt him
*Withstood an electric shock strong enough to paralyze a grown man
Immense Poison Resistance
-Resistant to poison, toxins, and chemicals
-Drank five cans of laxative-filled juice without any negative effects
-Mosquito's poison didn't effect him





Superhuman Senses
-Can see in the dark
Healing Factor
-Recovers from injuries faster than normal
-Wounds inflicted on him by the Ortho siblings healed fully in a couple days

SKILLS





Master Hand-to-Hand Combatant
-One of the best fighters in the series
-Can fight with foes who're physically stronger than him, or have better aura control
-Fights by striking critical points on the opponent's body to deal large amounts of damage in a short time
-Can knock a person out by touching one spot on their neck
-Good at finding patterns in enemy fighting styles
-Can kill a target in one strike
-Favors sneak attacks
Genius-Level Intellect
-Has knowledge on a wide variety of topics
-Amazing analytical skill
-Quick thinker and extremely adaptable
Master Strategist
-Can devise complex tactics, run accurate simulations, and evaluate his plan's success rates in the middle of battle




Weapons Specialist
-Can turn any object into a lethal weapon
-Wields a pair of yo-yo's with great dexterity and finesse





Stealth Master
-Proficient in hiding, spying, and infiltration
-A Hunter renowned for her hearing said she couldn't hear Killua's footsteps
Expert in Tailing
-Chased two people around town without them spotting him

EQUIPMENT





Skateboard
-Skilled in riding it
-Can carry the weight of five people and a shelf without breaking





Yo-Yo's
-Killua's main weapons
-Made of an unknown metal alloy
-Each one weighs 50 kilograms, though Killua wields them easily and with great dexterity
-Good for conducting electricity

ASSASSINATION TECHNIQUES
Muscle and Joint Control
-Can dislodge his joints at will in seconds
-Used to escape being bound


Claws
-Can transform his fingernails into razor-sharp claws
-Sharp enough to sever limbs and heads, and rip out people's hearts




The Snake Awakens
-Whips his arms around with incredible speed
-Cleaves through anything his arms touch
Shadow Step
-Can move without making a sound



Rhythm Echo
-A movement that makes afterimages through a varying cadence of steps
-While the move is in use, Killua makes no noise
-Can form several afterimages




Assassin Mode
-A state Killua enters by detaching all emotion and focusing only on killing his target
-Helps Killua channel his strength and concentration



NEN

The ability to harness and manipulate the aura present in the user's body
-Aura is the energy that gives beings life
-Production of aura is constant inside the body
Killua has great control over his aura
-While Gon can release more aura at once, Killua has better control over it
-Is considered one of the best aura controllers alive
Can sense and see the auras of others
Six types of Nen
-Killua knows one of these
-Every Nen user has an affinity for one of the types



Transmutation
-Lets the user change the properties of their aura into something else
-Killua has an affinity for Transmutation
-Can transform his aura into electricity
-While his aura is transformed, can shock foes by touching them, channel electricity through his yo-yo's, or throw lightning bolts
-Has to absorb electricity from an outside source before Transmuting his aura

NEN TECHNIQUES





Ten
-Keeps the user's aura from leaking out of their body by forming it into a shroud around them
-Reduces their aging and protects them against emotional attacks




Zetsu
-Stops the user's aura from coming out of their body
-Leaves the user defenseless, but makes it easier for them to sense the aura's of others
-Masks the user's presence



Ren
-Expands the size and intensity of the user's aura, increasing their physical abilities
-Can keep Ren active for several days without tiring




Gyo
-Concentrates some of the user's aura into a specific body part, increasing its strength
-Leaves the rest of the body more vulnerable
-Has a stronger version called Ko, which concentrates all of the user's aura into one body part to enhance it even further, but it leaves the rest of the body completely defenseless



Ken
-Uses Gyo on the user's entire body, letting the user defend against attacks from all angles
-Tiring to maintain



Shu
-Extends the user's aura to an object they're carrying, letting them enhance it with Nen as well




In
-Completely conceals the user's aura, making them impossible to sense





En
-Extends the user's aura out in the shape of a sphere around them
-The user can sense the shape and movements of anything that enters the sphere
-Hard to maintain



HATSU

The personal expression of one's Nen abilities
Killua's Hatsu revolves around his Transmutation and electricity



Thunder Palm
-Shocks the opponent by transmuting his aura into electricity and touching them





Thunderbolt
-Fires a bolt of lightning from Killua's palms



Godspeed
-Generates a surge of electricity in Killua's own body, boosting his speed to much higher levels
-Makes his hair, hands, and feet glow with electricity, and his body give off electric shocks to harm foes who touch him
-Can generate electric currents between his hands to burn anything between them
-Becomes powerful enough to overpower Royal Guards in this state, which he couldn't even scratch in his normal form
-Moves fast enough to disappear from sight while running, and move like a bolt of lightning

-Two techniques make up Godspeed, Speed of Lightning and Whirlwind
*Speed of Lightning increases his travel speed, letting him move faster than any land vehicle while carrying heavy weight
*Whirlwind transmits electrical pulses to his brain at a much faster rate, greatly boosting his reaction time

WEAKNESSES



Aura Shortage
-If Killua uses too many Nen techniques in succession, he could run low on aura
-If Killua runs out of aura, he dies
Needs to drain electricity from an outside source to use Transmutation
-Godspeed drains his electricity supply very fast
Relies on speed over strength
Can be cocky and reckless at times
Gets nervous if he loses confidence in his powers
Gambling

(Killua: Assassination—It's the family trade. We all take it up. My folks see me as an exceptional prospect. But I don't see that I should have to live up to their expectations.)
----
Jaganshi Hiei



AKA: Hiei, Imiko, Flying Shadow, Hiei of the Evil Eye
Age: Unknown (Speculated to be somewhere between 16 and 99 years old)
Height: 4' 10" 
Weight: 105 lbs.
First Appearance: Yu Yu Hakusho (Chapter 20: The Deadly Trio!)
Theme:

Feats:

-Achieved A-Class status at the age of 5
-Stole the Shadow Sword from the Spirit World vault
-Would've defeated Yusuke in their first encounter had it not been for Kurama's interference 
-Defeated Seiryu
-Curbstomped Zeru in battle
-Defeated Kuro Momotaro and bypassed his sword and fire immunities  
-Defeated Bui after absorbing the Dragon of the Darkness Flame
-As an A-Class Demon, fought on par with Yusuke Urameshi without his dragon boosts
-Was recruited and trained by Mukuro, one of the strongest S-Class demons 
-Killed Shigure
-Assisted Team Urameshi in defeating Yakumo
-Was voted the most popular YYH character in the first popularity poll
-Became an Upper S-Class demon

Spirit Classes:

-A class system that ranks the power of a demon
-Anything a weaker class can do, so should the current class level

E-Class Demons
-The weakest class 
-Stronger than the average human
-Can lift and swing a tree

D-Class Demons
-The second weakest class
-Can survive dips in lava

C-Class Demons
-The average strength of most demons
-Strong enough to break armors harder than diamonds

B-Class Demons
-The strongest class of demons that can be found in the Human World
-Can melt weaker demons with their aura alone
-Can kill humans by simply poking their heads
-Can carry 1,000 tons with no issue

A-Class Demons
-The second to highest class
-Are said to be capable of causing immeasurable destruction in the human world and nothing short of a nuclear weapon could stop them
-Considered to be a threat capable of destroying an entire country

S-Class Demons
-The highest class
-Considered to be planetary threats
-A single Lower S-class is strong enough to defeat a horde of five-hundred upper A classes by themselves with relatively little effort
-S-Class Demons can shrug off attacks capable of slicing through dimensions
-Sensui, who was a S-Class Demon, stated that 20% of his full power causes too much stress to the planet
    -Here's a calc for if Sensui isn't lying about this statement
-In the anime, Yusuke and Yomi's clash produced 1.8 Petatons of force (up to you to determine how legit this is) 
-Hiei is an Upper S-Class Demon

Physicality:

Strength:
-Fought on par with Yusuke Urameshi for 12 minutes
-Along with Team Urameshi, held up a huge stone pillar which was the ceiling to a building
-Stopped a battle axe with his bare hands
-Broke Bui's axe
-Destroyed half of an entire stadium
-Scales to the inferior Younger Toguro, who could lift an entire 1000 ton stadium on his back
-Considers 500 A-Class demons to be "pushovers"
-Scales to Sensui, who could create tornadoes in his fight with Yusuke and destroyed a mountain in the Demon World, which appears to be more durable than the Human World
-Sliced through an S-Class Demon's head
-Can further increase his strength with the Jagan Eye




Speed:
-Even as a D-Class Demon, appeared as a lightning streak to Keiko
-Even  as a D-Class Demon, can move fast enough to create afterimages
-Dodged Yusuke's Spirit Gun at point blank range
-Can move faster than the human eye can track
-Consistently moves fast enough to appear as if he's teleporting
-Sliced Seiryu, someone who can throw hundreds of punches in a split second, 16 times before he could throw a single punch
-Sliced through multiple demons while standing still
-While weakened, sliced off Makintaro's armand returned to starting position without Makintaro noticing
-SavedYusukefrom an explosion
-Completed a mission in 0.84 seconds
-Is consistently shown to be the fastest Yu Yu Hakusho character




Durability:
-As a baby, survived a fall out of the sky
-Withstood the Dragon of the Darkness Flame, which is composed of hellfire 
-Endured being punched through the chest
-Endured a beat down from the C-Class Kuro Momotaro  
-After absorbing Dragon of the Darkness Flame, was unaffected by B-Class Demon Bui's assaults
-Can take hits from Yusuke Urameshi
-Tanked hits from the S-Class Sensui
-Could still fight after losing an arm and being sliced through the stomach
-In the manga, Shigure, an S-Class Demon, survived having half of his head sliced off (though how he survived is as unclear as how Hiei got his arm back)
-Endured a punch from an enraged Mukuro, who could punch with the force of a nuke, and kept fighting

Equipment:

Bushido-Style Katana:
-2 feet curved blade
-Can slice through and redirect energy

Skills and Abilities:

Master Swordsman:
-Trained by the demon surgeon, Shigure
-Defeats powerful foes with nothing more than speed and swordplay
-Is so precise, he can stab someone without hitting any vital organs or muscles
-Fought and killed 500 A-Class demons 




Demon Energy:
-Also known as Demonic Aura
-Harnessed only by demons
-Weaker but more potent than Spiritual Energy
-B-Class demons, such as Younger Toguro, could melt demons with his aura alone
-S-Class demons can emit enough aura to stress the planet
-Enhances physical attributes




Elemental Resistance:
-Resistance to extreme heat and freezing cold
-Immune to normal fire attacks
-Shrugged off Seiryu's Ice Dragon attack, which can freeze almost anything
-Due to mastering Dragon of the Darkness Flame, hellfire hardly affects him now



-Can resist the effects of electricity




Fist of the Mortal Flame:
-Channels normal flames into his fists




Flamethrower:
-Releases a torrent of flames at his opponent




Jagan Eye:
-Surgically-implanted third eye
-Grants Hiei numerous psychic abilities 
-Can increase Hiei's power

Heightened Senses:
-Thanks to the Jagan Eye, Hiei's senses are increased to a supernatural level
-This ability can see minimal movements, and predict the attacks of opponents even before they are executed




Remote Viewing:
-Enables the user to look vast distances, and locate objects miles away, regardless of location perfectly



Mind Control:
-Allows the user mind control over youkai and humans, provided their spiritual power is low enough
-Can cast illusions, transform people into his mind slaves, create false memories, and erase memories

Mind Resistance:
-Gives the user complete domination and control of his own mind, able to resist powerful mental attacks
-Resisted Raigo's mind control




Mind Reading:
-Can read the minds of others






Jagan Binding Curse:
-Binds the opponent in a series of concentric rings of energy 
-Paralyzes the foe by binding their arms and legs in a rigid position

Telekinesis:
-Can move objects with his mind




Astral Projection:
-Can separate his spirit from his body
-Spirits in Yu Yu Hakusho are invisible to the human eye and intangible



Spiritual Awareness:
-Can see and interact with things invisible to the human eye




Possession:
-Can possess the bodies of others
-Spirits in YYH are capable of this, so Hiei's spirit should be able to do the same



Healing Factor:
-Can heal minor injuries
-Healed a gapping hole in his chest in seconds




Dragon of the Darkness Flame:
-AKA Black Dragon Hell Fire
-Summons black flames from the Demon World and shapes them into a dragon that attacks the opponent




Sword of the Darkness Flame:
-Infuses his sword with hellfire
-Powerful enough to slice through Kuro Momotaro's defense, which was resistant to flames and cutting attacks
-Said to be weaker than the Dragon of the Darkness Flame




Jaganshi Form:
-Enhances Hiei's physicality and psychic abilities




Black Dragon Wave:
-Fires multiple Dragon of the Darkness Flames at once




Dragon Absorption:
-Turns the Dragon of the Darkness Flame on himself and gains a massive boost in power




Repulsion Field:
-Can create a barrier that electrocutes the foe and pushes them back


Energy Absorption:
-Can drain the opponent of their energy
-Drained Bui of his Battle Aura

Weaknesses:

-Arrogant
-Not much of a strategist compared to Yusuke
-If the Jagan is blinded, Hiei is weakened temporarily 
-Overusing the Dragon of the Darkness Flame will drain him of his energy and force him into hibernation 
    -This didn't occur in his fight with Sensui however, so either this no longer applies or not all of his energy was depleted or         plot


("No Mukuro. You've just missed the point. Now you can leave your hatred in the past where it belongs. Now you don't have to be shackled to it anymore. There are things in the future that are worth living for, both for you and for me.")

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