An enchanted paper-and-quill scroll-crafting set whose magical sheet links to a new scratchpad tab.
The Coffee Shop Author Kit — a sheet of magical paper, a quill, and a jar of black ink — comes in Carl's "Gold Makeup Sex is the Best Sex" box (the AI's apology for the gerbil tantrum). Mordecai notes such scroll-crafting sets are pricey tools for scholar/arcanist classes; the magical sheet mirrors a new tab in one's scratchpad (writing on either appears on both), and if the correct spell and glyphs are copied onto it, a sellable scroll appears at a market kiosk — or, with a printing press, self-made scrolls or tomes. Carl briefly panics that a new scratchpad tab could expose his secret cookbook tab, but finds it slots in as a harmless third.
Since writing even a simple scroll takes skills he lacks, Mordecai advises he just sell the set — though its unlimited market-listing quirk (and the trick that reusing a scroll 200 times teaches you its spell) intrigues him.
A sheet of magical paper, a quill pen, and a capped jar of black ink; the pen writes on its own to mirror the scratchpad.
A scroll-crafting toolkit Carl can barely use, valuable mainly to sell or for its scratchpad-linked paper.