Round 274

The humming intensified, vibrating through the stone itself now—each pulse a slow, deliberate beat that seemed to match the rhythm of her own racing heart. Abby pressed herself against the opposite wall, trying to put maximum distance between herself and the shifting surface. Easy, easy, she muttered under her breath, more for her own benefit than anything. Just... don't freak out. Don't touch anything. Don't breathe too deeply. The air tasted wrong—like metal and something else she couldn't identify, something that coated her tongue with each inhale.