As I stepped into the darkened passage, the air shifted, cool and heavy, wrapping around me like a second skin. The doorway behind me shimmered briefly, and I heard a low hum—the spell formation sealing itself once more, locking me into this hidden path. I glanced back, watching as the intricate web of mana threads layered over the entrance, twisting and merging until the way out vanished entirely.
The formation was seamless, beyond anything I'd expected. I activated my [Eyes], focusing intently, yet the mana threads remained elusive, slipping just beyond the limits of my perception.
The formation didn't just conceal—it erased, rendering the entrance indistinguishable from the stone wall around it. Even my heightened senses couldn't pierce through the barrier completely.