Guide:
Found inside Santaki cave solo dungeon, western Alik’r Desert.
All Alik’r Desert solo dungeons have been remodeled and polished. This is also the case with the Santaki dungeon. The Santaki shard is now located inside a small side room in the southeastern part. Once you enter it, keep going to your right and soon enough you’ll end up in this area.
You’ll recognize the entrance to Santaki dungeon by all the caravan wreckage scattered around nearby.
