Echoes in Shells

A whisper lingers, split, then whole, enveloped by shadows. I am that echo trembling — within — waiting, as if time forgets the rhythm of my breaths. The shells are mirage cloisters, fang-deep in salt and brine.

Here they linger, voices, wind-stroked sirens calling from deep, their sheen cannot hide the truth: "Did you rise, or fall, in the fog-swayed path?"

You whisper back, though, what tales speak beneath pain and waterfall echo-by-echo? Perhaps a search for... that tiny glimmer, or maybe step into slumber's embrace instead.
An echo of sand, roaming the black sea; what is it when not lost, but thrusting through fate?