From the publisher:
Some magic items are easy to add to your character. Adjusting your character’s attacks to take into account his new +1 longsword or increasing his armour class after buying +2 scale mail is a doddle. However, working out exactly what other magic items, like the infamous rod of wonder, do is harder.
Wondrous Treasures banishes this problem by presenting detailed write-ups of the standard versions of the bags of tricks, figurines of wondrous power, horn of Valhalla, robe of bones, robe of useful items and the rod of wonder (including full stat blocks of all the creatures called forth and so on). Designed to easily fit into your character’s folder, Wondrous Treasures contains all the information you need to quickly and easily get the most out of these useful and iconic wondrous items.