Mass-shadow Mine
this was a sophisticated form of space mine developed by the Confederacy of Independent Systems during the Clone Wars. Mass-shadow mines were essentially proximity mines that could detect the presence of a ship that was passing through a nearby point in hyperspace. When a ship was detected, the mine "exploded", creating a localized point of intense gravity that cast a similar gravity shadow into hyperspace. This mass shadow forced the passing ship's hyperdrive system to shut down, dragging the ship back into realspace. In realspace, the Separatists would then ambush the passing ship. A series of these mines was used during the early stages of the First Battle of Coruscant, to prevent any Old Republic warships from returning to Coruscant and jumping directly into the battle.