Fan Made Heroic Spirits Reboot

Alex Mercer - Assassin - Prototype - Requested

Class: Assassin

True Name: Alex Mercer

Alignment: Chaotic Neutral

Original Series: Prototype

Lore: Alex Mercer, the anti-hero from *Prototype*, is a viral entity created from the Blacklight Virus, a biological weapon of mass destruction. Once a human scientist, Mercer became a living virus capable of consuming and mimicking other life forms, gaining their memories, abilities, and even their forms. After being betrayed and hunted down by the very organization he worked for, Mercer unleashed the virus on New York City, plunging it into chaos. With his newfound powers, Mercer seeks revenge, while also grappling with his own loss of identity and sense of morality. In the Holy Grail War, he takes on the Assassin class due to his stealth abilities, his proficiency in infiltration, and his capacity to strike from the shadows with lethal precision.

Summoning Relic: A **vial of the Blacklight Virus**, a symbol of the destructive and transformational power that Alex Mercer embodies.

Parameters:

-Strength: A

-Agility: B+

-Endurance: A+

-Mana (Prana): D

-Luck: E

-Noble Phantasm (NP): A

Class Skills:

-Presence Concealment (A-): Alex Mercer is highly skilled in blending into his environment by assuming the forms of his victims or using stealth tactics to move undetected. Presence Concealment allows him to mask his presence almost entirely, making it difficult for enemies to detect him until the moment of his strike. At Rank A-, Mercer can remain undetected even by high-level detection or sensory abilities, as long as he doesn't initiate combat. His ability to consume and mimic others' appearances makes this skill even more dangerous, as he can infiltrate enemy ranks without raising suspicion. However, once Mercer initiates an attack or uses his viral abilities in a flashy manner, the concealment fades, drawing attention to his presence. His mastery of infiltration and disguise makes him an unparalleled Assassin-class Servant when operating covertly.

Personal Skills:

-Viral Consumption (A+): Mercer's signature ability, Viral Consumption, allows him to absorb other living beings entirely, gaining their knowledge, skills, and physical forms. At Rank A+, this skill allows Mercer to completely devour a target in seconds, assimilating their memories and abilities seamlessly. This gives him a vast array of combat styles, knowledge, and information that he can use to his advantage in any situation. More than just a tool for deception, Viral Consumption also heals Mercer, allowing him to regenerate from even fatal wounds by consuming his enemies. The downside is that consuming another human erodes Mercer's sense of self, further blurring the line between human and virus. In battle, this skill ensures that Mercer can adapt to any environment or opponent, making him a truly versatile and dangerous enemy.

-Shapeshifting (C): Alex Mercer's body is fully malleable due to the nature of the Blacklight Virus, granting him the ability to shapeshift into any person he has consumed or create deadly weapon forms. At Rank B, Shapeshifting allows him to instantly transform his limbs into various weapons like claws, blades, or even massive hammer-like fists. He can also alter his physical appearance to perfectly replicate anyone he has consumed, making it nearly impossible for his enemies to discern his true form. In combat, he can use this skill to change his attack style on the fly, adapting his body to counter any threat. This shapeshifting ability is the key to his versatility, enabling him to exploit his opponents' weaknesses while protecting his own vulnerabilities.

-Regeneration (B): Thanks to the Blacklight Virus, Mercer possesses an almost unrivaled regenerative ability. At Rank A, Mercer can heal from nearly any injury in seconds, whether it's regenerating lost limbs or recovering from devastating attacks. His regeneration speed is enhanced further by consuming living organisms, replenishing his health by absorbing their biomass. This makes him exceptionally difficult to kill, as even severe injuries can be undone in a short amount of time. However, his regeneration is not unlimited: prolonged combat without consuming others weakens his healing factor. In battle, this ability allows Mercer to stay in the fight far longer than most Servants, making him a relentless and unyielding opponent.

-Viral Mutation (B+): This skill represents Mercer's ability to evolve and adapt to new situations or threats. Viral Mutation allows him to alter his biology on the fly, developing new abilities or strengthening existing ones in response to the challenges he faces. Whether it's growing additional armor to defend against a strong attack or enhancing his speed to dodge projectiles, Mercer can fine-tune his body to survive nearly any scenario. However, the more Mercer mutates, the further he drifts from his original human form, which may cause unpredictable side effects, both mentally and physically. This skill ensures that Mercer remains one of the most adaptive Servants in the Grail War, able to continuously evolve to stay ahead of his enemies.

Noble Phantasms:

-Name: Blacklight Genesis – Viral Armageddon

-Rank: A

-Type: Anti-Army

-Ability: The *Blacklight Genesis* Noble Phantasm is the ultimate manifestation of Alex Mercer's viral powers. When activated, Mercer unleashes the full potential of the Blacklight Virus, rapidly spreading a wave of viral biomass across the battlefield. This biomass infects and consumes everything in its path, assimilating living beings, machines, and even Servants into Mercer's viral network. The more enemies that are consumed, the more powerful Mercer becomes, as he absorbs their biomass, skills, and abilities. This Noble Phantasm effectively transforms the battlefield into a viral wasteland, creating a massive advantage for Mercer as his enemies are overwhelmed by the spreading infection. However, this power comes at a great cost: once unleashed, Mercer risks losing control of the virus, turning the battlefield into a chaotic mass of uncontrollable destruction.

-Name: Blade Arm – Scythe of Oblivion

-Rank: D

-Type: Anti-Unit

-Ability: Mercer's *Blade Arm* transformation is a deadly close-combat Noble Phantasm, turning his right arm into a massive blade capable of cutting through anything. When activated, the blade extends to incredible lengths and can strike with devastating force, cleaving through opponents, fortifications, and even magical barriers. The *Blade Arm* is particularly effective against heavily armored targets, as its sharpness and strength are unparalleled. In battle, Mercer uses this Noble Phantasm to eliminate enemies with swift, brutal strikes, overwhelming them with the sheer power and speed of his blade. The *Blade Arm* also has a corrosive effect, as the Blacklight Virus embedded within it weakens and infects anything it touches. However, due to the immense energy required to maintain the transformation, Mercer can only use the *Blade Arm* for short bursts, making it a decisive but limited weapon in his arsenal.