This one will probably show up in a not-D&D game sooner or later.

This is a magic item composed of two parts. The first is a pair of spectacles, or a signet ring, or a brooch, or a tie clasp – something designed to be worn easily and casually. The second is a quill or fountain pen, depending on the game’s milieu.

Words written by the pen are visible only if the reader is wearing the paired item.

Use for spellbooks, conspiratorial correspondence, or your teenage witch’s diary detailing her current warlock crush.