The mass-shadow mine represents a type of space mine that the Confederacy of Independent Systems engineered during the concluding period of the Clone Wars.
This mass-shadow mine functioned as a sophisticated, proximity-triggered space mine. It would detonate upon sensing a starship traveling in hyperspace. Upon detonation, it unleashed a gravity surge, replicating the impact of a planetary gravity well's mass shadow, thereby compelling the targeted vessel to exit hyperspace. The weapon's primary purpose was to ensnare ships traversing hyperspace by disabling their hyperspace drives. It saw significant deployment during the Battle of Coruscant, where mass shadow mines hindered Republic reinforcements from reaching Coruscant to support its defense.
The Empion mine, utilized by the forces under Warlord Zsinj and Admiral Apwar Trigit, represents a later, improved iteration of this technological concept.