Vanish is a weakness of pixies, instead of reaching physical overflow they disappear without a trace. (and you cannot stabilize them.) I think the same is also true for stun damage - this is why operating on little pixies has to be done while they are completely aware of their surrounding and why pixies suffer greatly from this kind of research.
As presented in Aetherology 5e
VANISHING[spoiler]
Type: M Action: Free
Range: Self Duration: Special
Creatures with the Vanishing power have the ability to
disappear entirely from the physical and astral planes at
will, leaving no trace of their existence. While the disappearance
can be captured on film, video or trideo cameras
with ease, there is no way known to stop or prevent it as
neither physical nor magical barriers can stop a creature
from vanishing. Though no one knows where creatures
with the Vanishing power go when they disappear, paranaturalists
and occultists speculate that they go to the
metaplanes of astral space to which the fey are native to.
They may also reappear with a Complex Action; although
they may choose to materialize directly without going
through astral space, although they may also choose to
appear there if they want to. [/spoiler]
As presented in Runners Companion 4e
Vanish [spoiler]
When a critter would die from any cause, be it
old age or the detonation of a nuclear weapon, it
vanishes from this world, leaving no trace. This
disappearance can be captured on film, video, or
trideo cameras with ease, but there is no way known
to stop or prevent it—even the critter itself seems
powerless to remain. Researchers debate exactly
where the critters go; many suggest they transition
to some metaplane where they cannot die. Naturally,
no resuscitation, autopsy, or cybermantic procedure
is viable on the critter without a body to work with.[/spoiler]
Big difference.... the runner's companion is more balanced but the aethorology is the official 5e.
Probably should pretend it doesn't exist and go with 4e's version.
