Xenoblade Chronicles 3: Masha Full Hero Quest (Lapidarist Extrodinaire)
Xenoblade Chronicles 3 Expansion Pass Wave 3 Hero Quest.
In order to begin this quest, you must have purchased the Xenoblade Chronicles 3 Expansion Pass. Head to the Serene Square in the City once you have reached either chapter 5 or 6 (I forgot the specifics, sorry).