Sculpted by: Arlen Pelletier
Release: 2022
Edition: Special Edition
Used material(s): Cast in antique brass-plated solid metal
One of: 500

Signed: Coby Bird (Rufus)

Issued in Ghost Door box
Buy it here Skelton Crew Studios

First appearance: Keys to the Kingdom #4
Use the Philosophoscope
Philosopscope telescope

More information:
(possible spoilers)

This Special Edition: $20 from the sale of each Special Edition Philosophoscope Key will go directly to support The Ed Asner Family Center.

In envisioning what the center could become, the late Ed Asner described “a place where our most beautiful dreamers of all can have their place to thrive and in doing so learn valuable lessons about themselves and the world.” Today, it offers support, classes and more to special needs families.
This key is one of a limited line of special edition keys signed by amazing folks from the Locke & Key universe, benefiting a charity of the signers’ choice.

The Philosophoscope Key was used by Dodge to spy on Keyhouse Manor. He uses it to supposedly find out who an “Untrustworthy Ally” is, and ends up spying on Rufus (who he now believes to be said untrustworthy ally) and Sam Lesser (who is the real Untrustworthy Ally, but cannot be seen by the Philosophoscope while he is a ghost).

The settings that are seen on the Philosophoscope are as follows:

“Beste Teacher” (Best Teacher)
“Truest Love”
“Usefullest Soulle” (Most Useful Soul/Person)
“Untrustworthie Ally” (Untrustworthy Ally)
“Grave Hazzyrd” (Grave Hazard)
While there may be more settings, these appear to be the only ones. When the user looks through the scope, it shows the person who best fits the desired category.

Guide to the known keys entry:
“…Hannes asked me to come with him, in his quiet inflected English. I told him I liked it better when I thought he was mute because at least then he couldn’t tell me lies. But I took his hand and went with him. He walked me to the Philosophoscope in the tower. Once I realized where we were going, johnnie, I didn’t want to go, and couldn’t help myself. Once I realized what he was going to show me. He put the Key in, and shifted the lever to Truest Love and asked me to look. Oh Johnnie. How I have lied to myself for months. He knew what I would see somehow even thought I didn’t…that I would see him…”

Source: Locke & Key Wikia