Kipperwald's Perlustration Prevention

What's it called? Kipperwald's Perlustration Prevention (in short, KPP)

What does it do? Well, this is your basic anti-scry spell. Kipperwald's job is to make the room in which you cast it absolutely safe and locked from all scrying attempts made against your person -at least, as long as you remain in the said room-. The protection is unbreakeable regardless of any of your would-be-scryer's bonuses. After some time (dependant on skills), the effect wears off and the room can be 'seen' again.

Its main utility, I gather, is in the PK World, a place where it is always good to have your presence hid and unfoundable from time to time. That's why it is a Last Order primary. Nevertheless, even then I don't think it is much use (they have their own unscryable 'safe room')

Where is it? Related as it is with seeing and not seeing, the spell belongs properly inside the Everything You Ever Wanted To Know About Everything grimoire, at the Unseen University Library.

What does it require? An eye, which is consumed in the process, and an octogram.

What skills do I need? Convoking, Scrying, Divining

Has it worked? The proper output should read something like this:

You prepare to cast Kipperwald's Perlustration Prevention.
You think about giant eyes gazing upon you. With an evil grin, you squish the eyeball you are holding.
You think about scrying, spying and watching.
You feel the magical potential of the room, judging how to block spies.
You toss the eye into the centre of the octogram where it is consumed in a flash of octarine light.
The octogram flares in a bright magenta for a few seconds and the smell of sulphur fills the air.

Help Information:

Kipperwald's Perlustration Prevention - make a room impervious to scrying.

This is a defensive spell that causes a room to be protected from scrying for a limited duration.