The knife drifted in the endless expanse of space, its origin shrouded in mystery. No one could fathom when it came into existence; its age eluded enumeration, and its nature was utterly unpredictable.

A cosmic ballet brought it hurtling towards Earth, a silent witness to the celestial chaos of asteroids showering the planet. It has made countless kills across the cosmos. As it descended, it pierced the atmosphere, landing with a foreboding splash upon the tumultuous waters.

The Soul Slasher demanded a Leader, a mortal soul destined to wield its power and command its terrifying potential. With an ominous resonance, the Soul Slasher released a mere gram of an otherworldly liquid. This ethereal substance unfurled across the ocean, intermingling with the cosmic debris from the falling asteroids. A sinister alchemy took hold, birthing organisms that writhed beneath the surface—a precursor to a grotesque metamorphosis. 

From the depths arose monstrous fishes, their forms warped and mutated by the eldritch fusion of asteroid particles and the Soul Slasher's mysterious liquid. This was only the beginning; a macabre journey awaited these aquatic aberrations. Their mutation would not cease; instead, they would evolve into a more horrifying stage—the genesis of a new, grotesque humanity.

The Soul Slasher, a harbinger of unfathomable horror, reveled in its role as the architect of fear, orchestrating the unholy transformation with each calculated drop of its fluid.

And so, the Soul Slasher's legacy unfolded, etching a terrifying narrative on the canvas of the Earth's waters. The Leader, yet undiscovered, would be the key to unlocking the full extent of the horror the knife had set in motion. It wasn't the end; it was the inception of a cataclysmic revelation, the herald of an unfathomable darkness that awaited its moment to consume the world.

It slumbers for millions and billions of years, patiently awaiting its master's mutation or creation. It has made countless kills across the cosmos, leaving a chilling trail of terror that spans the reaches of the unknown.

The story of The Journey of the Soul Slasher had just begun, and its next chapter would be inscribed in blood.