Guild Wars 2

Got tired of looking for this thing in Frostgorge Sound. Looked up the location in a guide and it turns out it appears to be missing for me. I’m 99.9% sure I’m in the right location. Am I missing something? Do I have to do/have something with me to locate the sliver?

You aren’t in the correct area:

http://dulfy.net/2016/08/09/gw2-bloodstone-sightings-current-events-guide/#Bloodstone_Sliver

Good luck.