I just thought the pull out on the hilt was added to an old dagger. Like olden day Sith would have used it to match the shape of moons or something and it was adapted to show the DSII wreckage.
That’s also a really good option. Although I like the EU wackiness of the Force influencing the Death Star wreckage falling etc etc, I’m ultimately gonna go with either reforging the dagger or adding the hilt to the dagger.