Guide:
Troll’s Tootphick solo dungeon hides this skyshard. Entrance to this dungeon is just a few steps east of Troll’s Toothpick Wayshrine in northern Bangkorai.
Go up the steps into the ruin there and you should see the wooden doors that take you inside Troll’s Tootphick. Be careful of the Trolls inside since trolls regenerate their massive health pool and hit hard.
The skyshard is inside the small side room, in the northeastern part of the dungeon. This part of the dungeon has a cracked ceiling and the light is coming in from the outside.