The passage opened when someone who owned the house touched the handle.
Corvus stood in a lower chamber at Grimmauld Place with his hands raised, and the Dimensional Passage turned and shifted into a portal with dark shimmer.
He stepped through.
The transit lasted perhaps four seconds. The passage between carried the same faint wrongness it did the first time he tested it, depth without dimension and direction without sense.
Mictlan opened on the other side.
He had been in large spaces before. The Nest at full capacity. The undersea dome beneath Crete. The Egyptian cavern under Abydos. None of them had prepared him for the particular quality of Mictlan's vastness.
Mictlan was large, very much so. The scale did not register because there was nothing to register it against.
The dimension stretched outward in all directions under a dimly lit sky. Dimness sat over everything that made distances unreliable. The ground beneath his feet was stone, pale and smooth, worn flat by something other than footfall. Structures rose in the middle distance, the pyramid Mictlantecuhtli had built as his seat was enormous and low against the horizonless air, its sides carved with runes that the elder had pressed into the dimension's architecture the way one pressed a seal into wax.
Souls drifted between the structures.
Thousands of them were in immediate view. Thousands beyond. They moved without purpose in a slow drift. They were not translucent like the ghosts of Hogwarts. They were simply present in a different register, visible to his Necromancy.
None of them reacted to his arrival. The dimension, on the other hand, did.
He felt it the moment his feet settled on Mictlan's stone. The realm's attention moved toward him as a compass needle moved. It recognised something in him, the skills it had given him through the shroud, the elder's absorbed memories now living in his flesh, but the recognition stopped short of acceptance. His magical core was not Mictlantecuhtli's. The dimension could feel the difference.
He let it while his tendrils came out.
They unfolded from his shoulder blades in the silence of Mictlan without sound, darkness spreading into darkness, but distinct from it. They rose and curved behind him in two great arcs, each strand alive with the slow internal pulse of violet and crimson that came from the souls already absorbed. At full extension, they hung behind him like wings, thick at the root, tapering toward long trailing points that moved with the unhurried certainty. He started to float up his tendrils, dancing lazily like a drop of ink in still water.
When the tips hardened, the trailing ends thickened, darkened and compressed until they were no longer shadow but something closer to obsidian, solid and sharp, and the shift happened across every tendril simultaneously, dozens of dark spears formed from living shadow, hanging in Mictlan's dim air.
He moved.
The first soul did not register the approach. It drifted on its slow circuit between two pale structures, following a path it had walked for so long that the concept of other paths no longer existed for it.
A tendril flashed forward in the blink of an eye and pierced it.
The entry was clean. The soul simply stopped its drift and then began to move against its will, drawn backwards along the tendril toward Corvus in a thin stream of compressed essence. The devouring started, and the absorption began, the soul unravelling thread by thread as it travelled, each part of it passing through the obsidian tip, along the shadow strand, and arriving at his core, deepening it, making it ...more.
His soul grew denser by a measure too small to quantify and too real to ignore.
He moved to the next.
And the next.
He had found himself a dimension of the dead.
Tendril after tendril extended and struck and withdrew, each soul absorbed, adding its weight to the deepening that had begun with the first. His awareness of Mictlan sharpened with each absorption. It was similar to standing in a room as the lights came up slowly. Details that had been indistinct resolved themselves. The runic structures of the pyramid become as clear as written words on a parchment. The paths the souls drifted were not random. They followed channels cut into the stone at a depth invisible to the eye, routing mechanisms pressed into the dimension's foundation, the same principle as the ley-line bindings Mictlantecuhtli had driven into the earth above.
After thirty souls, he paused.
Something was different.
He had felt the distinction vaguely since entering, but had not stopped to examine it. Now he turned his Necromancy inward and ran it across the souls he had devoured back at Syria, comparing what he found there against what continued to drift around him.
The effects of the Syrian souls he had taken at Douma were still fresh in his mind. When he compared them against the Mictlan souls he had just absorbed, the difference was immediate and structural.
The Mictlan souls had arrived here with direction.
Not in the sense that they had chosen it consciously. In the sense that their belief had already prepared the route. They had lived within a cosmology that described Mictlan. They had performed the rites that Mictlantecuhtli had embedded in the cultures above, the observances that functioned as binding agreements between a soul and a destination. When they died, they did not wander. They followed the architecture their own faith had built for them, and they arrived here as expected.
The Syrian souls carried nothing like that. They had been absorbed directly by him. They had no cosmological expectation of Mictlan. They had never performed any of Mictlantecuhtli's rites.
The routing mechanism was not death itself. It was a belief.
Mictlantecuhtli had not built a dimension that caught souls the way a net caught fish. He had built a dimension that souls navigated willingly because he had given them the map beforehand, pressed it into every ceremony, every myth, every rite of the cultures he had shaped. The temples had not been intake valves for the dead. They had been the mechanism that the living agreed in advance to come here when they died.
That was the operating principle.
Corvus stood in Mictlan and held that understanding and felt the dimension orient toward him fully.
He held the elder's memories of building this place from the pocket of dimensional space outward, every decision that had gone into its construction sitting in him with the completeness of lived experience.
The dimension finished its assessment, and the compass settled on him.
He accepted it without ceremony, then he turned toward the pyramid.
The structure was vast, wide and covered in runes that now read clearly as commands written in coding language, instructions pressed into stone rather than parchment. It was exactly what the elder's memories showed him. A seat of authority built to anchor the dimension around a central point.
He had no interest in the pyramid.
He raised both hands.
The tendrils spread fully behind him, obsidian tips hardened, the full spread of shadow wings filling Mictlan's horizonless sky. He used the dimension's own principle. He understood the architecture. He understood the operating mechanism. He pressed his own intention into the structure the same way the elder had pressed his, with the confidence of someone who had read every instruction and was now simply replacing one set with another.
The pyramid dissolved. The stone released its insistence on its own shape, and the runes faded. The structure came apart in slow silence, each block descending into the pale ground without violence.
The ground where it had stood was empty for a moment.
A moment later, a castle rose, not built but willed, stone forming from the dimension's substance in the style Corvus had carried in mind since the moment the pyramid began to fall. Black stone blocks started to form. The vertical lines climbed, spires multiplied as the structure rose. Flying buttresses extended from the main body and found their footing in the pale ground. Window apertures opened in lancet arches along every facade, the glass within them holding a faint crimson light that had no external source.
The central tower climbed highest of all.
When it was done, the castle stood in Mictlan as though it had always been there, and the pyramid had been the temporary mistake.
The souls drifted around it without adjusting. They did not know what had changed.
Corvus lowered his hands.
The tendrils folded back into him, obsidian tips softening and dissolving as the shadows returned to their resting place. The dimension's weight settled around him with the particular stillness of something that had finished deciding.
He opened Dimensional Passage and stepped through.
--
The arena stood on Hogwarts' eastern grounds, assembled by the faculty and a team from the Ministry over the previous weeks. Warded walls enclosed a rectangular floor. Three lanes ran the length of the space, separated by low barriers. Projection charms floated overhead on enchanted frames, each one angled to give the viewing stands a clean line of sight into all three lanes simultaneously.
It was the twenty-fourth of November. The sky above the Highlands carried winter cloud and enough cold to make breath visible.
The stands were full.
Not merely Hogwarts students. Ministry observers had taken an entire section. Beauxbatons and Durmstrang families who had made the journey filled a second. Journalists, including Rita Skeeter, occupied a press box that had not existed yesterday. Beyond them, stretching to the upper tiers, students from all three schools sat in rows.
The duelling bracket was scheduled to begin on the adjacent court immediately after the first task concluded. Boards displayed the draws. The potioneering competition had already run its preliminary round in the castle that morning, and the results board near the entrance showed Castor Black at the top of the preliminary scores, followed by a Durmstrang sixth year and Hermione Carrow.
Vinda stood at the head of the judges' platform with Maxime and Karkaroff to either side.
The three champions were already on the floor below.
Viktor Krum stood with his arms crossed and eyes focused. His Durmstrang robes were dark and heavy.
Fleur stood with the particular composed alertness she had developed over the last weeks, the Beauxbatons blue immaculate.
Altair Black stood apart from both of them.
He was built like all the Nestborn Blacks were built; wide shoulders came from genetics and monstrous effort. His dark robes carried the mark of House Black. One silver eye and one purple eye moved over the arena with the mild professional interest of someone assessing a training ground they had not used before.
His expression gave away nothing. He was not nervous. He had never been nervous about a task set by people who had not spent their summers in the Nest.
Those summers had not been vacations. The senior Nestborns ran the training sessions. Adequate to them was exceptional to the rest of the world.
Other than physical training, there were the memory vials. Every vial was given to the trainees on the subject they wanted. Starting from duelling with people who had fought in the Alliance wars. Charms architecture from Unspeakables, who had spent a decade in the Department of Mysteries and Transfiguration principles. These were what he had taken each summer.
His gaze returned to the task in front of him; it was a gauntlet.
Three champions would run it simultaneously. Scored on speed, precision, and judgement. Obstacles, including curse-triggered gates, transfiguration puzzles, and a restraint segment that penalised brute force. One combat crossing point where the lanes merged briefly, and champions could engage each other.
-
A sound crossed the arena from the direction of the main gate. Fleur turned first. The gate had opened to admit a single figure. Corvus Black crossed the arena floor in the direction of the champions' area.
His pale hair tied back, his height and the density of his presence doing more than any formal dress would have managed.
The stands registered his arrival; he crossed the floor to Fleur first.
His arms went around her, brief and genuine, not a courtly gesture or a political one. His mouth pressed a light kiss to her cheek.
"Good luck to you," he said quietly.
Fleur held him back for one moment, then stepped away with her composure intact and her colour marginally higher than it had been.
He turned.
Altair was already looking at him.
Corvus met the silver and purple eyes across the short distance and gave a single nod. Altair's chin lifted by a fraction. His expression did not change. He turned back to face the lane.
Above the arena, Vinda's voice carried cleanly over the stands.
"Champions. To your marks."