(I changed some things up about both Kayako and Mary, in order to better suit their crossover storyline while hopefully making it a little more fun along the way. There will definitely be a part two eventually, so please enjoy this first installment of the war between these beautiful yet also quite dangerous women!)

Bloody Mary Worth was an evil woman who had never once expressed the slightest amount of remorse regarding all those innocent children she'd first murdered in cold blood, then sacrificed to the Devil in order to gain more power while becoming very nearly invincible along the way, and it was only the thoughtful actions of the local townspeople who lived in her hometown of Plymouth, Massachusetts that finally put an end to her reign of terror and deceit. Burned alive at the stake without so much as a trial or any use of torture whatsoever, for all the evidence necessary to prove her guilt beyond the least shadow of doubt was found inside her old house and also in the nearby deep woods as well, Mary's sick and twisted mind somehow ended up blaming those God fearing people for the crimes that she herself had been guilty of this whole entire time, and with her dying breath swore an oath of vengeance upon any man, woman or child foolish enough to summon her forth by saying her name three times while standing in front of a mirror. After this her soul descended to the very depths of Hell where it truly belonged, only reappearing whenever some unfortunate individual did that which brought her up from the abyss once more.

Mary had long felt nothing but pure hatred for one Kayako Saeki, the vengeful ghost who had been tragically murdered by a jealous husband in a fit of absolute rage, and after waiting for the perfect opportunity to strike whenever the other female least expected it to occur, Mary for the first time ever summoned herself forth rather than waiting for Kayako to say her name three times while being in the presence of a nearby mirror. The sinister witch had never been able to do this before on her own, but somehow these two spirits hated one another so much that any normal procedures for doing things were thrown out the window and the rules of engagement were completely rewritten when it came to Kayako Saeki and Mary Worth. The demonic witch, for reasons all her own which not even the dangerous yurei could understand, had taken it upon herself to mentally torment Kayako at every single opportunity which presented itself, but at last the moment came for these two malevolent entities to face each other inside Saeki House, yet it was Mary who struck first as she attacked Kayako with murderous intentions, breaking apart the largest mirror in the attic before using them as truly deadly weapons against her hated enemy. At first dozens, then hundreds of medium to large pieces of broken glass were sent flying in Kayako's direction, most of which made contact with their intended target as the pale Asian ghost screamed in absolute agony, while those razor sharp edges easily sliced through her putrid looking flesh, causing blood to gush all over the place as she fell to the floor, landing with a rather sickening thud for good measure.

Mary snickered and would even smile sadistically more than once, for as she looked around the attic there were three other mirrors which could also be used against the cursed home owner as well, so she wasted no time in inflicting maximum torture upon Kayako, using her unholy powers to break apart every single mirror available to the psychotic witch in that particular area, before sending countless pieces of broken yet also still very sharp glass right into, and even in some cases through the now helpless body of Kayako, leaving the unconscious yurei's appearance to be almost unrecognizable compared to the powerful woman who had stood before Mary only minutes earlier. With very little effort on her part, Bloody Mary had more or less defeated, or thought she had defeated, one of the most powerful ghosts to have ever existed in the afterlife, so now all that remained was to burn now this accursed Saeki House and victory would indeed be hers. Kayako's spiritual powers had always protected her home from either being torn or burned down by real estate developers or teenagers out looking to make a name for themselves at her expense, because that was the only sure way to completely destroy this heartless ghost once and for all, but now Mary herself was about to face some rather unforeseen and detrimental circumstances, which she could have never predicted would happen at this moment in time. Slowly but quite surely, the realization dawned on her that by breaking the cardinal rule of never manifesting herself unless someone else summoned her presence first, Mary had now permanently sealed her own fate and would remain trapped inside Saeki House forever, whether it burned to the ground or not. Unless of course, she was able to find another mirror downstairs to use as an escape route, because if not then those very same mirrors which gave her almost unlimited abilities would also be the cause of her own destruction. 

Mary ran down the stairs as she frantically searched for another mirror, and much to her relief several more of them were scattered throughout the haunted residence, so after breathing a sigh of relief her plans would now be slightly altered to suit her needs accordingly. Mary would still burn Kayako's body along with the house, but she would also take great care to preserve at least one mirror to use whenever the situation called for her prompt and permanent leave of absence from this terrible place. She smiled wickedly while casually walking back up the stairs which led to the attic, but much to her horror Kayako was no longer lying motionless in a large pool of blood, but rather standing in that very same spot as she glared at the other female, and now it was Mary's turn to scream at the top of her lungs while feeling an incredible amount of pain as well. Kayako's long black hair suddenly shot out from the ghost's head and began whipping Mary's entire body from head to toe, leaving deep cuts and severe bruises as it mercilessly battered the startled witch with more than enough force to draw an enormous amount of blood, yet that was not the worst of things to come for Mary either, because now the breaking of bones commenced as that very same hair wrapped around body parts, cruelly snapping them like twigs as screams of excruciating pain continued to be heard inside the attic. No doubt every single bone was broken and for the first time since their encounter, Kayako was the one smiling because clearly she enjoyed this very much, indeed so much so her hair easily lifted the broken and brutalized witch up for the pale spirit to look at for several seconds, before throwing Mary down the stairs like a pile of garbage as the instigator landed in front of a nearby mirror. 

Yet Kayako was not done with this wretched female, for she now sensed that Mary was far too weak to use anymore mirrors as weapons against her, which meant the vengeful yurei could break the remaining ones inside her house whenever she wished, and so Kayako went about doing just that as her hair proceeded to break them all into a million pieces with ease, leaving only the mirror in front of Mary intact to more or less torture her defeated opponent with right now. Kayako would wait a little while longer before sealing the witch's fate for good, because being trapped inside Saeki House meant Mary could be destroyed in an instant by the Asian terror. The battered woman felt what little remaining energy she had leaving her body with every mirror Kayako smashed, and in hopeless desperation she even tried saying Bloody Mary three times to see what happened, yet after nothing whatsoever occurred Mary somehow forced herself to do the seemingly impossible just then, literally throwing her broken body right into the last remaining window, only seconds before Kayako planned on destroying it as well. Perhaps Mary's spiritual prowess as a witch saved her from ultimate annihilation, because something other than her physical ability was able to lift her motionless body up from the floor and in the process, she disappeared through the only completely intact mirror left inside Kayako's decrepit home, thus ending this extremely violent confrontation between two equally powerful and determined women. Blood Mary would return to the eternal abyss to recover from the overwhelming amount of damage she'd suffered at Kayako's more than capable hands, while the Asian female did the same because she too, after crawling back up the stairs before collapsing in yet another pool of her very own blood, had a great deal taken out of her by an enemy she certainly wished to never face again. Rest was what they both needed right now, but their next encounter might very well be the last for one or perhaps even both of these notorious female harbingers of destruction.