Mana burn

See also: anti-magic zones, power negation, energy drain

This is applicable to magic users, cyborgs and robots and any others that use some vague concept of "energy" to fuel their abilities.

Variants:
* Eats away portion of energy reserves and delivers damage or other effects proportional to it.
* Feeds more energy to the system, having no detrimental effect until energy reserves are full or beyond maximum capacity, after which it delivers often quite violent burn effect.
* Transfer of energy (obviously not applicable if this is voluntary)

This can be an actively applied harm by a third party or something that can happen on its own (either at any time or under certain circumstances).