I've thought about making a "word search" and embedding the passphrase in it using a pattern (e.g., a subset of a Knight's tour, a space-filling curve overlay, or some other sampling algorithm).
https://www.passwordcard.org/en
I used to keep a password card in my wallet and had a pattern I would use.
https://www.passwordcard.org/en
I used to keep a password card in my wallet and had a pattern I would use.