They entered with the cautious curiosity of archivists and warriors. Inside, corridors branched like veins, lined with stone tablets engraved with short, precise diagrams: spiraling seals, vectors of chakra flow, and notation that suggested experiments in containment and redistribution. The deeper chamber held a circular dais, and at its center hovered a shard of crystal—dim, and humming with an unstable cadence. It felt alive in a way that made Naruto uneasy: not malevolent, but restless, as though chakra were a caged migration refusing to be quiet.