From the beginning of the Star Wars: Dark Droids arc, the Scourge has seemed almost invincible. As a hybrid of the Spark Eternal and technology, the villainous entity can take over other droids and cyborgs, adding them to the its hive mind. In a short amount of time, the Scourge has racked up many victims, both organic and droid, in its quest to consume the galaxy.
Source:https://www.cbr.com/star-wars-r2-d2-threat-counter/