Book of Secrets (5e Equipment)
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Wondrous Item, artifact (Requires attunement by a spellcaster)
Millenia algo, a group of wizards got frustrated about their lack of knowledge. So they called the Archmage Aranil, and together, they created the Book of Secrets, a book that could show its wielded the secrets of the Multiverse. Currently, Aranil still has it, and the detrimental properties of the book are suppressed while it is attuned to Aranil.
Forbidden Whispers. If you are attuned to the Book of Secrets, you can open the book and ask one question. You will then receive the answer in a strange whisper, and the knowledge of how to apply it. You must complete a short or long rest before you can use this property again.
Arcane Secrets. While attuned to this Artifact, you know all 1st through 9th level spells for your class.
Innate Knowledge. You can cast the Identify spell at will.
Supreme Knowledge. Your Intelligence becomes 25 unless it is already 25 or higher.