The Wizard's Bookmark is a favorite among wizard's due to how it eases the task of navigatiing through a spellbook, especially in times of need. While the bookmark remains within a spellbook it counts as an arcane focus and at the end of a long rest, you may choose one spell within your spellbook that is not prepared to mark. As a bonus action, you can exchange one of your prepared spells for the marked spell. If the spellbook contains additional Wizard's Bookmarks, then you can choose an additional spell to mark, up to your spellcasting modifier (minimum of 1). The appearance a Wizard's Bookmark varies in size, shape and material. Some might appear as a thick piece of runic paper, while another could be a long ribbon with metallic embroidery.
Notes: Utility, Focus
I like it.
Thanks man