Universal blast carrier.
It turns out that the toxic cloud of WTC dust is unusually empowered to store blasts. Any school can use it. It only takes a half ounce or so to store a minor blast, and about a handful to store a significant blast. (You can use more, but that’s the minimum.) The dust can be spread on any surface, essentially coating other objects with a mystical booby trap.
Finally, if a target can be made to inhale WTC dust holding a significant blast, part of the damage (the sum of the dice, or all of it for rolls under 10) will never heal naturally. This residual damage manifests as multiple, long-term respiratory conditions.
After 9/11, a large number of adepts swarmed around lower Manhattan, picking around for natural artifacts and other cosmic debris. A cabal of annihilomancers were the first to experiment with the dust, but it didn’t take long for word to get out about its supernatural niche.
Note: WTC dust must be quite pure to carry a blast. There’s truckloads of the stuff floating around the underground, but supplies are limited. Getting you hands on new WTC dust at this point is quite difficult, though it may be possible to refine some pure WTC dust from the ongoing decontamination efforts.
On further consideration, the dust should require an extra minor charge to bobby trap the dust, unless the dust or rubble is associated with the school.
(This means that booby trapping the dust takes two extra minor charges, not just one, except for annihilomancers.)
Prehaps this dust can be refined further by a Dipso in order to give his booze one hell of a kick 😛
(just a joke)
A Dipso could store a minor blast in his booze anyway. In fact, it’s one of the examples given in the “Special Delivery” heading of the Blasts section.
The really big benefit of the dust is that it can be used to store a Significant blast, and that it can be used by any School.