Inside the Chiselshriek Mine dungeon, eastern Craglorn. Northwest of Inazzur’s Hold and its Wayshrine, northeast of Mountain Overlook Wayshrine.
Start at Inazzur’s Hold Wayshrine and follow the road northwest. Get off the road and when you reach the crossroads head north until you see the mine entrance. The skyshard is in the northeastern corner of the biggest cave room, partially covered by a rock. The last boss, The Gracious Beacon, is in the middle of the room.
View of the dungeon entrance.
Dungeon’s entrance location on Craglorn map.
Shard is in the northeastern corner. The boss is on the left.