|First Appearance||Ben 10 vs. the Negative 10: Part 1|
Vortess Nebulae is a powerful spell, capable of creating an "invisible" force field which can deflect lasers, rays or beams. After it's initial use, the caster may reform or deform the shield at any time using the aura it initially formed over their hands.
Charmcaster refers to this as an invisible force field spell though it was shown as a visible blue force field.
In Ben 10 vs. the Negative 10: Part 1, Gwen used Vortess Nebulae to protect herself from a ray blast.
Ben 10: Omniverse