Carnillean Key

Carnillean Key is obtained during The Hazeel Cult quest if the player chooses to side with the cultists. It is found from Carnillean house basement by searching a crate. It is used on the Carnillean Chest in the secret room upstairs.

When players search the create they get the message:

"you search the crate under the food packages you find an old rusty key"

Trivia
Interestingly, using the Carnillean Key to unlock the Carnillean Chest will not consume the key. Players who wish to obtain multiple scripts can do so and are also not required to do the Drop trick.