The Traveler's Guide to Aellorah
The Eldenfolk are the first race of Dwarves that appeared on Aellorah, and the wisest. They have keen minds geared towards philosophy, magic, and scholarly matters. They are the most skilled practitioners of magic on Aellorah, and make up a majority of the Dwarves found on mainland Reshyk. Their minds are incredibly resilient and can absorb information from text by simply touching it, giving them a diverse range of memorization abilities.
Your people's minds are ironclad, and you retain information nearly indefinitely. Once per long rest as an action, you can absorb the knowledge contained within a text, book, or scroll, giving you proficiency in knowledge skill checks related to the topic of the book, as well as proficiency in any tools associated with the subject. If the absorbed text is a spell scroll, you can absorb the knowledge of the spell temporarily to allow you to cast that spell once without expending a spell slot. Spells cast in this way still require the necessary material components. Information absorbed with this ability is retained with crystal clarity for the duration. The information absorbed is retained for 24 hours before the effect wears off and you lose the absorbed knowledge.
Additionally, at any time, you can protect one memory at a time, making it impossible to forget, even by magical means.