Thanks for this suggestion, never seen these guys before but they’re incredibly talented and very enjoyable to watch

It sounds like a cursed item in D&D or something.

The Book of Faces Wondrous Item, very rare

This enchanted tome magically records the likeness each humanoid slain in its vicinity, preserving a snapshot of their life and memories. The book can be read to glean superficial information about it’s subjects. As an action, you can tear a page from the book to summon a ghostly spirit of its subject, which will be magically compelled to answer questions. The spirit knows nothing the owner did not know in life.

The Demon Lord Elgor Ithym is said to have a keen interest in this book…

Good catch, I think we’ve been bamboozled ladies and gentlemen. Well played OP