The Book of Bill
According to Bill, you can build this out of ducklings.
What is an atomic bomb?
In the intro to the first episode, this backwards message is hidden at the end.
What is "three letters back"?
The name of the face stealer in the Lost Legends story, Face It.
What is "Mr. Whats-his-face"?
This print-outable card is hidden in the skull on this is not a website dot com.
What is "Get out of death free card"?
This platypus adjacent creature is explained in Journal 3. It has a common pattern on it.
What is the "Plaidypus"?