A seasoned librarian must be swift and discreet. Wear this to increase ATK SPD of two Cookies with the highest ATK SPD boost rate by X%.
Evaluation
* Improves the ATK SPD of the two Cookies with the most bonus ATK SPD, has extremely effective utility in attack-speed compositions.
* While it's recommended mostly for those specific compositions, it can nevertheless still help other progressing Cookie teams, and its buff targets can be easily selected via Toppings.
