Planewalkers in Lightning (TIP)

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Records of travelers journeying to the quasiplane of Lightning are extensive, but they provide little indication of a consistent explanation as to the nature of their stay. Some come to charge magical items, some to mine vividium-an extraordinarily rare substance found amid the storm clouds (essentially, it's solid lightning)-and some to deal with the natives, whom many believe to possess secrets regarding the manipulation of energy for useful purposes.
==Spell Keys and Other Necessities==
The detrimental effects of the quasi plane on certain types of spells can be overcome through the use of spell keys. The keys here take on unique forms: bursts of energy. To produce specifically controlled blasts of power, a spelkaster needs a device called an accumulator. This small magical storage cell draws in ambient energy and then allows the energy to be expelled. A typical burst released by an accumulator is too small to inflict damage on a creature or object, but large enough to serve as a spell key. Of course, the spellcaster must know the specific amount of energy and the type of burst required in order to fashion the desired key.
Interestingly, an accumulator functions only in the quasiplane of Lightning. In most other planes, it simply fails to work at all, while in the Positive Energy Plane, it overloads almost immediately and explodes, causing 2d10 points of damage to the person holding it.