Something Irreplaceable

Something Irreplaceable is a 5★ weapon in Honkai: Star Rail.

Something Irreplaceable was released on January 1, 2001. They were introduced alongside Before the Tutorial Mission Starts, Solitary Healing, But the Battle Isn't Over, Sleep Like the Dead, Hey, Over Here, On the Fall of an Aeon, Night on the Milky Way, In the Name of the World, Cruising in the Stellar Sea, Texture of Memories, Eternal Calculus, Moment of Victory, Time Waits for No One, For Tomorrow's Journey, suggesting they were part of the same content update.