From publisher blurb:
Every Blessing ignored becomes a Curse.
A magical enhancement to Lords of Gossamer & Shadow, allowing characters to place beneficial or harmful magical effects upon persons, places, or even things. Allowing PCs and GMs to emulate some of the greatest stories, be it brother cursing brother before being thrown in a pit of despair, or a fey lady blessing the ruler of a land.
This addendum provides magicians with the means of crafting blessings and/or curses, including ways they interact with Stuff and with other powers. A step-by-step system walks magicians through the process of describing the condition to be bestowed, its qualities (severity, persistence, duration, etc.), and the means it may be cast. Also provided are three sample usages of the power: mild, moderate, and major.
Addendum: Blessings & Curses can be used in any game based on Erick Wujcik's Diceless Role-Playing, existing alongside powers such as Sorcery and utilizing a system identical to Artifacts & Creatures. Allowing you to seamlessly enhance your new or existing game with a wondrous new discovery.