Force Lightning

"and now, young Skywalker - you will die"

Force Lightning is a tremendously dangerous technique used in the Star Wars universe, it is heavily associated with Emperor Palpatine but has also been used by many other Siths throughout history : it involves channeling the Force into deadly lightning that can shock enemies to death or send them hurling great distances, it is sufficiently powerful that it could even end the life of a weakened Darth Vader (who died saving his son from a sadistci Palpatine, who in his last moments unleashed a wave of Force Lightning that electrocuted Darth Vader).