As history was so keen to often do, it repeated itself. In over his head, rapidly drowning, Shingen desperately turned to the only life-preserver that he had available, no matter the consequences. He was just a kid. He didn't want to die! Not here, not like this, not at all! The pounding voice in his head demanded release in return for salvation. It was a command through which, only by the strongest application of will, that Shingen was able to resist. He did not grant the voice the sweet, sweet freedom for which it yearned, but the chuunin did choose to drastically weaken his own seal, letting the tainted chakra of the Nibi run through his veins, begging the feline to do anything to save him, if for no other reason than to save itself.
Yes! YES! My freedom is soon at hand!
A terracotta-tinted sinew erupted over Shingen's chakra-covered form, consuming the jinchuuriki in a cocoon of flesh and tissue. The mass rapidly expanded, until the heap of flesh dwarfed the forest in which the battle had been taking place. Four legs manifested, with two tails, a head, a defined structure. A large, sinew-and-muscle feline was birthed into the world with a ferocious roar. It was nearly the size of a natural bijuu, a startling indication of the precipice on which Shingen's faltering seal resided. With a swing of one of its mighty tails, the Nibi shattered its returned bijuudama, creating a massive explosion. With speed befitting the fastest of her kind, Matatabi created a deal of distance between itself and the explosion, so as to mitigate the damage.
However, as the giant concerned itself with the more visible threat, it neglected the human below. A powerful punch connected with the beast's flank, sending it reeling, sliding several hundred yards backwards, crushing thousand-year-old trees as it went. The skinless beast recoiled, readjusting itself and turning to face its minuscule foe, its heterochromatic eyes - one gold, one green - locked on its foe. The feline pressed its front body low against the ground, ready to pounce upon the little fox that dare oppose the mighty tigress. The beast gave a mighty roar, loud enough to rip the leaves and branches off of the trees infront of itself. It was not a roar of hatred or anger, but the roar of a prisoner so desperately clawing its way to freedom.
Two fiery, blue-and-black tails swished back and forth in unison, as a pair of mismatched eyes stared intently at the intruder of her realm. Surrounding the beast was a set of seven crystalline lights, shimmering with a ruddy, dirtied glow in a realm that was otherwise nothing but blackness. There was no floor, no roof, just suspension in utter darkness. The seven crystals were connected by intricate metal wires, giving Matatabi's cage the illusion of being one massive chandelier.
The great beast purred, causing the entire black world to seem to shake in time with her rumbling. Her soft, feminine laughter echoed through the darkness, as if the sound was coming from all around. Her speech echoed off of the non-existent walls, as if she were in a cave. Her voice was soft, but sharp, not unlike a scolding mother to her child. "So you're the one that this boy wants to kill so badly,"
the beast teased, her swishing tails coiling around her form. The bijuu lay casually in her cage, as if she were completely free of fear. She looked almost like a sphinx, coy and poised to delight on unaware travelers.
"Would that a single generation go by where one of your kind does not torment us oppressed, Uchiha-san,"
mused the great beast, her millennia-old memory casting its thoughts back to Obito, Madara, and the Akatsuki. "I'm sure you would make Madara proud."