Answer:
What can be heard and caught but never seen?
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
High born, my touch is gentle. Purest white is my lace. Silence is my kingdom. Green is the color of my death.
With pointed fangs it sits in wait. With piercing force it doles out fate, over bloodless victims proclaiming its might. Eternally joining in a single bite.
What is lighter than what it is made of?