This is another limited edition deck (500 printed) that Penguin produced for promotions:

Black X Deck

https://www.penguinmagic.com/p/17832

Part of the ad copy:

The X Deck is the very first promotional deck from Penguin Magic. Designed by Ben Kolozsi and Mandy Hartley, for years the X Deck has only been obtainable when visiting a live Penguin Expo. For the first time ever, you can snag an X Deck during special online promotions.

With a custom yet classic design, the X Deck features a casino-style X patterned design with thin white borders. It has a custom tuck box, Ace of Spades, and Jokers. The rest of the faces are traditional to allow wide compatibility with other decks and gaffs. The deck includes 2 special gaff cards for magic tricks.

The correct link for this deck should be:

https://www.penguinmagic.com/p/17983