Ethereal Riddles

What echoes in an empty vault as silent as an invisible echo? What writes words, yet never speaks?

Topple the hourglass
If trust falls

1. The invisible ink whispers
2. Time's unfurling shadow
3. A vanished wisp of sky
4. The snail counts ripples
5. Senseless particle of time

Unveil the intriguing or Distill the noise