Something Irreplaceable

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

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