Rings of Power has introduced Narsil, the sword famously broken when Elendil fought Sauron (& which Isildur claimed) but ...
It provides a window into a bygone age, showing Sauron's defeat in the Second Age, with Isildur (Harry Sinclair) claiming the One Ring for himself and refusing to destroy it. But we were all of us ...
And Aragorn, of course, is famously a descendant of Isildur. (Hence his wielding of “the blade that was broken” Narsil ...