Vacuum Wave Spear (真空波動槍 Shinkū hadō yari) is a technique used by Riesz in Seiken Densetsu 3. She learns this tech only when she class changes into a Valkyrie. This tech allows her to clone her lance, whereupon she hurls them at all foes present on-screen when her attack gauge meter reaches yellow in color.
Riesz will start off by holding her lance over her head before spinning it. Vacuum disks will then be sent flying from her hands, whereupon they will swiftly pass through the bodies of all foes.