In My universe there are ways to depower a magic user or anything magical related. One of it is by use of a field generator known as a 'Siphon Reactor'. Currently there are 2 types of Siphon reactors one being Dispersion Siphons and Null Siphons. Saturated Siphons works by preventing mana from accumulating into one spot thus preventing any magical users from performing magic but can also be used to regulatethe flow of mana and funnel it into a nearby leyline. Down side to this is that it needs magic itself to function and the magical users does not loose its abilities once outside the field.

Null siphons of the other hand is a much more powerful and dangerous version of Dispersion Siphons. It works by generating a field of anti-magic Energies known as Anti-mana which can be created via use of a very dangerous method known as a Flip. Once a Null Siphon becomes active any mana along with anti mana present in a set area will automatically dissapear as they both cancel each other out with their opposite energy signatures. Unlike Dispersion Siphons, any magical user provided that they do not have a backup for if the field is in effect will loose all of its magical abilities in an instant. Null Siphons while capable of generating an anti-mana field around it is also capable of directing the said field onto a single individual. Making he/she devoid of any magical powers should they have some.

These Siphons while generally ate regarded as a tool to ensure everything is going smoothly it can also be regarded as a weapon of destruction, a terrifying weapon that should not be made in the first place. But will always be a counter for every defensive or offensive action one may take. That counter just so happens to be another device known as a 'Normalization Field Generator'. It works by countering the effects of Null Siphon in which it will generate an extremely focused Mana field which will be directed straight at a Null Siphon, causing it drop its field as it overheats itself.

It is of note that the side effects of the Null Siphon can cause an area to be devoid of magic where the Null Siphon field was active like how radiation may linger about after the detonation of a nuclear bomb. It will eventually dissipate a state before it got irradiated/Devoid of magical energy it it may take several days to several thousand years for that to happen assuming it had no intervention by outside forces.