Manual of Quickness of Action

Wondrous Item, Very Rare
This book contains coordination and balance exercises, and its words are charged with magic. If you spend 48 hours over a period of 6 days or fewer studying the book's contents and practicing its guidelines, your Dexterity increases by 2, to a maximum of 30. The manual then loses its magic but regains it in a century.
Dungeon Master's Guide 2024
  1. DnD 2024 Magic Items › Manual of Quickness of Action