Arcane Focus, +1

An arcane focus is a special item designed to channel the power of arcane spells. A sorcerer, warlock, or wizard can use such an item as a spell casting focus, as described in the Spell-casting section.

While you are holding this leather-bound book you can use it as a spell casting focus for your wizard spells. You gain a +1 bonus to spell attack rolls and the saving throw DC of all your wizard spells.

Notes: Bonus: Spell Attacks, Bonus: Spell Save DC