Name	Grimoire of Hindsight
Type	W
Magic item	Yes
Rarity	rare (requires attunement by a wizard)
Text	This tome is covered in arcane sigils and lifelike depictions of eyes. It can be used both as a spellbook and an arcane focus, and you gain a +1 bonus to spell attack rolls while you hold it. As an action, you may replace one spell you have prepared with a different spell of the same level from this book. Once you have done so, you may not do so again until the next dawn. Source: Tasha's Crucible of Everything Else, Volume 1 p. 69 (Homebrew)