A Riddle Wrapped in a Mystery Inside An Enigma/Playing With

Basic Trope: A Stock Phrase, rooted in the unknown, described in hyperbole.

Played Straight: "A riddle wrapped in a mystery inside an enigma."
Subverted: "A riddle wrapped in a mystery inside an eggroll."
Inverted: "A fact established in certainty pronounced in obviousness."
Averted: "This riddle is quite a mysterious enigma."
Exaggerated: "A riddle wrapped in a mystery inside an enigma shrouded in secrecy buried in a brainteaser coded in a cryptogram."
Parodied:
- "A conundrum guarded by The Men in Black hidden among a pack of chupacabras."
- "...Like some sort of conundrum turducken..."
Justified: The phrase is uttered in a Biopic about Winston Churchill by Winston Churchill.
Enforced: The producer of a mystery story is also a history buff or just really likes the phrase and wants the work's creators to use it.
Discussed:

Alice: You're in over your head, Bob. This case is too big for you to solve.

'Bob: Oh really, is this supposed to be like one of those riddles wrapped in mysteries inside enigmas'?

Alice: In a word, yes.

Conversed:

Alice: Next, Adam West is going to say that The Riddler has left him and Robin "another one of his criminal conundrums... wrapped in a mystery inside an enigma."

Bob: Yeah, he would totally say that!

Lampshaded:

Alice: It's a riddle wrapped in a mystery inside an enigma.

Bob: Ha, a Winston Churchill quote reference. Nice!

Wrapped in this link is A Riddle Wrapped in A Mystery Inside An Enigma...