Ichigo Kurosaki vs. Muramasa

Ichigo Kurosaki vs. Muramasa is a fight taking place in the Zanpakutō Rebellion. It is the final fight in the Rebellion, focusing upon the conflict between Substitute Shinigami Ichigo Kurosaki and the instigator of the Rebellion, Muramasa.

Prologue
As Ichigo is immersed in Muramasa's reiatsu, he travels unconscious inside the crimson-red reiatsu. However, he emerges from the water in Kōga Kuchiki's inner world, wondering where he ended up. He hears Muramasa's footsteps upon the water, as the Zanpakutō spirit states that he is surprised to see him inside the inner world of his master. He asks Ichigo how he managed to reach this place, to which Ichigo responds that he has no clue either.

Ichigo asks Muramasa what this place is, to which Muramasa informs him that, like other Shinigami, he used to have an inner world, as Ichigo realizes where he is. He protests, stating that his Shinigami master is dead, as Muramasa says that it is beyond his comprehension. Muramasa wonders why he came here, postulating whether this is merely an illusion, or that his reunion with Kōga manifested this place from memory. He states that their time here is short, as a pillar plunges into the water below.

He, however, thanks the fates that keep the two of them intertwined