“Charge Breakers”
A basis of magical energy, there are “charge stones”. Advanced magical batteries.
There are two people known as “Charge Breakers”. They have the ability to change the release of magical energy from the stones, including completely draining them.
One of the breakers are not allowed to learn any kind of martial training. They are protected by a small cadre of guards that speak solely through a signed language; the guards are known for being particularly silent and quick to act, without apparently needing to communicate with each other.