PeVi and External Vis

[Tellus]

@RoP: I

Perdo Vim spells penetrate more easily, and have greater effect. The demon's body is actually eroded using these magics, and a demon that s reduced to an Infernal Might of zero is destroyed, leaving behind no corpse (and thus no vis)."

RoP: I, p. 33.

It is also the premiss of this spell.

Admittedly, this only indicates that might strippers have this effect against demons but we have used in more generally.