Ikinaka

Ikinaka (意気中, Ikinaka) is a technique exclusive to the House of X and its descendants. Known unofficially as Asura Mode (形式阿修羅, Keishiki Ashura) among the user population, it is considered a direct consequence of a child's imagination gone wild.

Overview
It all begins in the Devils Playground. A young boy, no older than 4, thrown in the lion's den and fed to the wolves. Experimentation followed solitary confinement which followed brutal games. Each was a step on the stairway of misery; they'd be joined by consistent betrayal and a burgeoning, cultivated bloodlust, one that reached demonic levels. That didn't stop the pangs of loneliness. So the boy did what any child does; create an imaginary friend. A girl, one that he'd confide in during those days in solitary, one who was by his side during each and every game, fight, or combat scenario. Two peas in a pod that continued unabated. A small comfort in the heartless abyss made by a mad scientist, she would be a source of strength and resilience, a little seed of defiance.

One that would come to a crashing halt as the boy turned teenager failed to manifest what the mad scientist wanted: the Rinnegan. Even when stuffed in a tube and left to suffocate, his imaginary friend would remain by his side, despite the afterlife beckoning. Then an intervention; the teen's savior would bring more than just the fabled dōjutsu, but a creative power the boy could not have dreamed of. The consequence; the imaginary friend was imaginary no more. Born from desperation and forged by trials and tribulations, she was remade as an Asura through the corresponding path. Bonded to the Six Paths power granted by the eye, she would manifest within each child he had, each grandchild, so on and so forth. But with her presence came a gift designed to protect descendants she considered her own. The gift often emerged in the most pressing of times; from breakthroughs to final stands.