Inside the “Broken Tusk” solo dungeon. Start at Forsaken Hamlet Wayshrine and go northwest, toward the beginning of the river flowing south. As soon as you come to the river you will see the stone building on the other side. Entrance to the dungeon is inside. Skyshard is located in the second, northern hall.
Dungeon location, the entrance is in the building across the river.
Dungeon entrance on the map.
Boss is guarding the approach to the collectible.
Location on the dungeon map.
Sand Kingdom Moons - Super Mario Odyssey Power Moons