Inside Vinedeath Cave public dungeon. Follow the road that goes east of the crossroads, north of Eldern Root. Vinedeath Cave entrance is north of this road, at the bottom of a nearby mountain. Collectible is inside the southeastern room of Vinedeath Cave. It is not hidden behind any obstacles. Across the shard you can find Storgh’s Bow that starts a quest of the same name. Killing Madruin mob in the cave room after this one, rewards with Vinedeath Cave completion achievement.
Find the entrance to Vinedeath Cave.
Vinedeath Cave entrance map location.
Skyshard is inside the southeastern cave room.