GABRIEL’S POVThe darkness is absolute.Not the kind where your eyes adjust. The kind that erases everything—the walls, the floor, the concept of space. It makes you question whether you still exist.I force my breathing to slow. Four counts in. Six counts out.It’s an old tactical protocol for enclosed environments: reduce oxygen consumption by forty percent. My pulse drops from seventy-two to fifty-eight, a deliberate, mechanical slowing I can feel thudding at the base of my throat.The vault is silent except for Isla.Her breathing is jagged, fast, and shallow. She is burning through our shared oxygen like it’s an unlimited resource, panic overriding the math she usually clings to."Isla." My voice cuts the dark. "Slow your breathing. Four in, six out."A pause. I hear the rustle of fabric against concrete as she shifts, but her rhythm doesn't change."I know how to breathe, Gabriel." The snap in her voice is brittle.She isn't slowing down. If anything, she’s accelerating. The mat
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