Much like its predecessor in Genshin Impact , Honkai: Star Rail features a wide variety of repeatable challenges for players to farm resources. Calyxes offer useful leveling items like Character and Light Cone experience materials, while the "Stagnant Shadow" challenges reward players with materials used to power up their characters. The "Echo of War" challenges feature rematches with the game's major bosses, granting resources that allow players to reach a character's highest Trace levels. Thre...