You Will Recall Our Names

You Will Recall Our Names is Disc 3, Track 2 on the Xenoblade2 Original Soundtrack. It plays during Unique Monster battles in the following regions of Xenoblade Chronicles 2:
 * Mor Ardain
 * Leftheria (including the Spirit Crucible Elpys)
 * Temperantia
 * Tantal
 * Cliffs of Morytha
 * Land of Morytha
 * World Tree

Similarly, it plays during Unique Monster battles in Gormott in Xenoblade Chronicles 2: Torna ~ The Golden Country. It also plays for the following story battles, as well as the cutscenes immediately prior:
 * Malos and Akhos at the Olethro Ruins, for the second phase of the fight (after Mythra's awakening).
 * Patroka and Mikhail in the Abandoned Factory, for the second phase of the fight (after Mòrag joins the party).
 * Jin in Temperantia.
 * Malos and Jin at the Cliffs of Morytha, for the second phase of the fight (after Pneuma's awakening).