Grimoire Infinitus

It is something wondrous, mind-blowing (requires attunement by a wizard)

A couple of spellbooks with overlaid pages and silver-plated covers were made during the Age of Arcanum, but only one was found since the Calamity wrapped up. The book has a boundless number of pages, is three inches thick, eight inches wide, twelve inches long, and weighs three pounds.

Dormant. A huge part of the book is clear, yet the going with spells are recorded in the essential pages of the book: alert, antimagic field, Bigby's hand, scourge, draw in individual, chaos, control environment, make undead, perceive contemplations, develop/decline, fear, feeling, vaporous construction, glyph of warding, legend, 5e Leomund's little bungalow, mass thought, delude, hazy development, Mordenkainen's dependable canine, multicolored shower, the light emission 5e, calm picture, transport, and thunder wave.

You can include the 5e Grimoire as your spellbook and copyist new spells into it incredibly. Right when you prepare wizard spells using the Grimoire, the amount of wizard spells you can design increases by 1.