On arriving in Uthodurn, the get together located Umagorn Smeltborne, a blacksmith. Umagorn recognized the sword they were aiming to have fixed was Dwueth'var, the Star Razor. He tells them that he can take care of it, but he will need iceflex, formed by a white dragon breathing on mythril. https://rowansnigz.izrablog.com/28643082/dnd-high-elf-an-overview