As I prepare for my next session, I wanted to share the Black Staff I created that will be in use. I built this as a sink for Fate Points, essentially subverting the will of the wielder, which I think plays much more nicely into the corrupting nature of black magic (especially where I think the actual staff comes from based on Cold Days and a WOJ I read somewhere).
THE BLACK STAFF (-3 if you already have Evocation and Thaumaturgy, or -5 if you do not)
Description: You possess the Black Staff, a powerful magical focus that aids in corrupting the fundamental forces of nature. It will also protect from the backlash of those actions... for a price. Currently both an office and an item of power, the Senior Council has deemed this a necessary but secret evil to protect the world against foes that would use the Laws of Magic against them.
Musts: You must have a high concept that represents either the item or both the Office of the Black Staff and the item itself.
Skills Affected: Conviction, Discipline, Lore
Effects:Karma Indulgence (reskinned All Are Equal Before God). The item known as the Black Staff is a force of natural entropy and is useful for that purpose; whether it's causing or perverting death, breaking minds, transforming to break or destroy, subverting time, or seeking beyond the natural world, it will absorb the consequences of such actions... for a price. When casting a spell that would violate one of the Laws of Magic, the wielder of the Black Staff may spend a fate point to ignore the Lawbreaker stunt for one particular law for the duration of the scene. If a new law is broken in that same scene and the wielder wishes protection from that, then a new fate point must be spent.
All Things Are Made To Broken (Sponsored Magic). This is a power conduit to more easily break the Laws of Magic and can only be used for that purpose. Benefits: Standard sponsored magic benefits. It also provides +1 to the power or complexity threshold on any spell intended to break a law of magic. It doesn't particularly care for the consequences of said actions and any backlash is flavored as dark tendrils drilling into the arm of the wielder.
It is what it is: A short staff made of gnarled wood. Shadowy power emanates from it.
One time discount: +2
Unbreakable**Update: It looks like My Dark Sunshine did this exact same design, modeling it on a Sword of the Cross like I did. I found it like three seconds after I hit the submit button. Now I feel sad.
**Update 2: Grr, we even built ours almost exactly alike. The only real difference is the wording and the fact Sunshine's version provides blanket Lawbreaker armor against all Lawbreaker spells in a scene for one fate point instead of one for each law (like mine). You can see his/her well written example
here