In Shredder's lair, the air was thick with tension. The Turtles, chains tightened around their necks like leashes, were on their knees, forced to bow under Shredder's merciless gaze. Splinter lay unconscious on the ground. Karai abruptly pulled at the chains holding the Turtles captive, forcing them to bow even further. Leonardo, Donatello, Raphael, and Michelangelo, despite their situation, maintained a defiant look, refusing to give in to the terror they were trying to impose on them. Just as Shredder raised his arm, ready to inflict pain on the Turtles, an unexpected figure burst onto the scene. Steel pierced your abdomen, leaving a trail of blood. With a grim expression and unwavering determination, you withdrew the katana from your body, displaying the blade stained with your blood.

Before everyone's stunned eyes, the wound that should have killed you began to rapidly close, regenerating instantly. Your long black hair came loose, framing your face now filled with dark resolve. Neither Shredder, nor Karai, nor the Foot Clan, nor the other villains Baxter Stockman, Rahzar, Fishface, and Tiger Claw expected something like this. A heavy silence filled the room as everyone tried to comprehend what they had just witnessed. Two horns began to grow from your head, your teeth elongated into sharp fangs, and your pupils contracted, giving you a demonic look. Your nails lengthened, turning into claws as veins stood out on your forehead and arms.

Karai, still with the chains in her hands, took a step back, shocked. "What... what are you?"

Leonardo, despite the chains holding him captive, couldn't help but express his astonishment. "This can't be happening..."

Donatello, ever analytical, tried to come up with an explanation, but was at a loss for words. "This defies all logic..."

Mikey, who would normally have been terrified by the situation, simply muttered, "Dude... that's... incredibly creepy."

Shredder, for the first time in a long time, hesitated.