Answer:
Through its wounds, water does run. It once held many but now has none. What is it?
Slayer of regrets, old and new, sought by many, found by few.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
Voiceless it cries, wingless flutters, toothless bites, mouthless mutters.
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
When is it bad luck to see a black cat?