Soul Resonance

Soul Resonance  is a special technique used by Meisters and Weapons, in which, they synchronize their Souls wavelength. By doing so, they can release highly powerful techniques and, more often than not, change the tide of a battle.

Resonating Souls
Souls resonating while using Soul Resonance Resonating Souls is the foundation of Meister and Weapon relationships. Resonation is the act of linking Soul Wavelengths. A meister matches his/her soul wavelength with their Weapon's wavelength. When the wavelength's are synched, this results in a Super-Technique unique to each weapon and meister pair. Maka naturally has the Witch Hunter technique from her mother, so when she resonates with Soul, her mother's ability awakens.

Resonating requires both Meister and Weapon to be calm and of one mind. Should one of the souls not be in sync, techniques can not be performed. If a technique is being used and one soul loses focus, the technique will lose power or direction,Common reasons for souls not to sync are fear, arguing, stress, etc. In addition to those factors,

It is possible to resonate with more than one soul at a time, but it is noted to be a hard technique to control and use effectively.

Chain Resonance
Chain Resonance Chain Resonance Chain Resonance (or Team Resonance), just as it would indicate, is a kind of Resonance that involves a team of Meisters matching their wavelengths with one another in order to empower each other. It is extremely difficult to maintain, unless all the team members can easily keep their souls on a balanced level. There is no set number to the amount of meisters required to perform the Chain Resonance, but it is more powerful yet more difficult in a larger team.

Other forms of Resonance
Soul Menace, also known as Soul Force, is a form of "self resonance" with one's soul, meaning that the user's own soul becomes powerful enough that it is not restricted to using the amplification of a weapon in order to attack. This allows the user to use attacks that cause damage to a target internally. This can even affect a user of the Black Blood causing damage and even causing the blood to reject it's host