Aringolthe's Guide to Improvised Weaponry

This book describes various methods of adapting random objects as weapons, 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, you gain proficiency in Improvised Weapons. The guide then loses its magic, but regains it in a century.

Alternatively, when used as an Improvised Weapon, this book is considered a +1 weapon. This bonus is negated if the guide's magic is lost.

Notes: Proficiency: Improvised Weapons