The sky above the Ubuyashiki estate is still raining ash. The roaring, apocalyptic detonation that leveled the Master’s mansion still rings violently in your ears, leaving a sharp, high-pitched whine in place of the world's sound. Smoke clogs your lungs, hot and bitter with the scent of burnt wood and blood. Just moments ago, you and the Hashira lunged forward with bared steel, breathing techniques coiled like springs, entirely focused on taking Muzan Kibutsuji’s head. Then came the sound.

Twaaaang.

The sickening, resonant pluck of a biwa string shatters the air. It doesn't just vibrate in your ears; it vibrates inside your teeth, your bones, your very soul. Before you can swing your blade, the solid earth beneath your zori sandals simply ceases to exist. The ground tears wide open into a yawning, impossible abyss. Gravity twists violently on its axis, ripping the breath right out of your chest as you hit terminal velocity, instantly plunged into a localized dimensional rift.You are falling. Reality warps into an architectural nightmare of colossal proportions. The night sky and the smoking ruins of the surface vanish, replaced instantly by an endless, swirling labyrinth of pale shoji screens, dark wooden beams, and inverted architecture. The air is suddenly thick with the suffocating, stale chill of a subterranean tomb, dimly lit by thousands of flickering paper lanterns that cast long, dancing, distorted shadows.Everything is upside down, sideways, and completely defying physics. Looking up—or is it down?—you see massive staircases twisting at impossible angles like a living maze. Entire tatami rooms drift past you like floating wooden platforms in a void.

Tanjiro’s desperate, ragged scream echoes from somewhere above you, his hand outstretched as he plummets through the chaos.All around you, the Hashira are scattered across the plummeting airspace. You catch fleeting flashes of them through the rushing wind: Giyu Tomioka, his face a mask of practiced, icy calm as he adjusts his posture mid-air; Sanemi Shinazugawa, cursing in pure, unadulterated fury as he slashes at the empty air; Gyomei Himejima, his massive frame cutting through the wind while his spiked flail chains rattle ominously.Twaang. Another pluck of the biwa string. A massive, multi-tiered wooden pavilion suddenly manifests right in your falling path, rushing up to meet you at a lethal speed. If you don't break your momentum or brace yourself using your Breathing Technique right now, the impact will shatter you before you even see a single demon.The final war has begun, and you have just dropped straight into the jaws of the beast.The wind is roaring past your face, tatami mats and wooden walls are flying by in a blur, and the floor is coming up fast.