Powerful items

... are items infused with magical power, documents of influence and other special items. These are a bit less common as rewards of quests and adventures than wealth and reputation and may give you either of these in addition to whatever power is hidden there.

As an example of a powerful item, there are magical weapons, armor and helpful trinkets such as the Ring of Invisibility and such. The most common powerful item to receive at the end of an adventure is a Scroll of Revival.