Grim Rose

The Grim Rose was a dark artifact that could kill when given a sample of the target's genetic material. The Rose worked by scanning people across the galaxy who have been affected or influenced by the target, over time finding people who have a progressively stronger and stronger connection to the target until it finds the target themselves. Once the Rose finds the target, it kills target along with every person the Rose scanned on its path to find the target.

The Rose could not be turned off and was durable enough to deflect a lightsaber. The only way possible to stop the Rose from killing its target and everyone along that target's path is by switching the target to a different person where it would begin a new path. If the Rose's target is killed by the Rose or is already dead, the Rose will turn off with its objective completed.

The Rose was briefly in the possession of the Rebellion who attempted to use the Rose to kill Emperor Palpatine, but stopped the Rose before it was able to, saving the lives of thousands of people scanned by the Rose.

Text and facts from the “Grim Rose” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.