Release: 2025
Sculpted: Arlen Pelletier
Edition: Legacy
Used material(s): Cast in antique copper-plated solid metal
One of: Unlimited

Signed: No

Issued in Ghost Door box
Buy it here Skelton Crew Studios

First appearance: Dog Days
Use:
Creates a new Keuhouse
Door: Keyhouse plaza, under a stone


More information:
(possible spoilers)

History

The Whispering Iron that would become the Keyhouse Key came from demons lured through the Black Door by Dodge in 2012.

While Duncan Locke starts to rebuild the Keyhouse by building a doorway, Tyler had been busy in the manor’s smithy/workshop (presumably). He removes one of the stones from the plaza in front of the burnt down manor and digs out a hole in which he fits a large keyhole. With a huge key, resembling Thor’s hammer, he then proceeds to flip up a whole new Keyhouse out of the ground.

Source: Locke & Key wiki