From the introduction:
The Mystic Spell Deck I contains the 62 mystic class spells from level zero through level three in a thick poker card format.
This spell deck allows players to easily reference their class spells and even manage their spell slots with visual representation. These spell cards have the full spell text and mechanics within, so no need to hunt down the rules, you have them at your fingertips!
The digital spell deck contains all the cards in a PDF format, bookmarked by level and individual spell for ease of reference on electronic devices. Please note, this is not a print-your-own product. The digital spell deck is free with purchase of the printed card decks.
You can even use multiple decks to represent your entire number of slots and memorized spells!