Brother Dusk unleashes a black hole weapon, destroying planets and escalating conflict in 'Foundation' season three

Brother Dusk unleashes a devastating black hole weapon, the Novacula, destroying multiple planets and factions. The weapon was intended as a deterrent, but Dusk used it to preemptively eliminate threats to the Empire as his reign nears its end. This act of genocide escalates the conflict, positioning Dusk as a major antagonist alongside the Mule.