Null

Ghost hunters perform a null with the use of paper spells, but it is not concidered one of the five techniques. A null is the act of cancelling out something else, in this case cancelling out spells, though it is also used to cancel out levels of energy in weapons used in training.

A null spell is not universal in that it covers all types of spells. One null will cancel out one spell, with the strength of each taken into account. Say a hunter is both invisible and getting ready to go through a wall. A null spell will either cancel out the invisibility or the intangibility, not both. And the person performing the null would have to know what wall the other was going to pass through, but that's not too diffucult to discern. If a hunter had (for some reason that wouldn't make that much sense) placed many invisibility spells upon themself, then performing a null would only take away one spell at a time. The number of null spells needed to cancel out all the invisibility spells is equal to the number of original invisibility spells.

The process was originally developed alongside clairvoyance because an anchor was needed. One Hunter would look into an object's past, but the threat of loosing their mind in that past was so great that another Hunter needed to be standing by with a paper spell of their own, ready to completely cancel out the first spell if it was required of them. It was soon discovered that the nulls worked equally well on the other techniques. The only one where a null is not an effective tool is in the use of telekinesis, or pushing, because the person performing the null has to know exactly what object or part of an object the other is locking on to. Creating a null for a whole person when the spell was for the person's foot won't work, even though the foot is part of the body. Nulls have to be speific.