Guide:
In the western part of Stonefalls, inside the Sheogorath’s Tongue – public dungeon (torch icon). The entrance to the dungeon is east of Sathram Plantation Wayshrine.
Entrance to Sheogorath’s Tongue is just west of the marked location on our map. It is a wooden door that stands between two large rock columns.
There are three paths within this dungeon, that lead to the largest Sheogorath’s Tongue room. You’ll want to follow the path that takes you toward the northern part. The shard we are looking for is inside the room in the northern dungeon. Some enemy resistance is to be expected.