Mage-necromancer and shards (Dragon Age: Inquisition)

Hello again.
Play the magician.
Spoilers last time chose knight. But I did not go. Decided to try again to collect all 3 skull. Looking for 2 day. And maybe I'm doing something wrong.
I went to look for them. 1 have been, although on the shore of a storm I still was not. Well, okay. Flopped there. Start to look. I found a map where you have to look for them. 1 in the center of the map found. There was a pile of bones and there he is. Coveted crock.
Then went to the upper and lower point. And nothing
Make sure to keep 3 times. Up and down.
Maybe someone passed. Please tell me or exactly where. Or maybe they just drop from monsters? Just can't find the is what day.
Smack