The vacuum shields were a pair of weapons carried by Lehvak-Kal.1, 2, 3, 4, 5, 6, 7, 8 They could suck all the air out of an area, causing a destructive implosion.1, 2, 3, 5, 7, 8 They could later release that air in a single blast with enough power to shatter solid rock.1, 2, 3, 5, 7, 8 They could absorb and hold a large amount of air like this for a long period of time before releasing it.4, 6 This gave Lehvak-Kal two powerful modes of defense, and there was no way for an opponent to know which it will choose.2, 3, 8 The vacuum shields were detachable weapons, but they needed to be connected to Lehvak-Kal to work.9, 10, 11
Since the Bahrag created Lehvak-Kal by mutating an ordinary Lehvak12, 13, 14, 15, the vacuum shields may have originally been acid shields. The vacuum shields survived Lehvak-Kal's defeat when it lost control of its own vacuum power16, 17 and blasted itself into orbit around Aqua Magna.7, 18 Lehvak-Kal remained in space after Aqua Magna joined with Spherus Magna again.19