Round 304

The humming intensifies, vibrating through the stone around them. The walls' breathing has ceased entirely now—all movement synchronized save for that rhythmic pulsing that seems to shake the very air. Abby feels it in her bones, a low frequency tremor that makes her teeth ache. Each pulse brings new light bleeding from the rock itself, soft blue-green tendrils that creep across the floor like living shadows. The entity's words echo again, clearer this time: "You are... familiar." The ground shifts minutely beneath her feet, and far off somewhere deeper in the maze, stone groans against stone. She can feel it changing around them, adapting to something new.