Hyperresonance is a rare phenomenon where two isofons react with each other, allowing the creation and destruction of matter. True isofons are rare but can be artificially induced by two Seventh Fonists. Luke and Asch have the unique ability to cause them on their own. It is nearly useless in battle because it is difficult to control, and careless use of it could destroy even the atmosphere; the destruction of Akzeriuth is caused by rampant hyperresonance triggered by Van Grants's manipulation of Luke. There also exists a second-order hyperresonance, a mostly theoretical concept concerning the interaction of two hyperresonances. In addition to the capabilities of normal hyperresonace, second-order hyperresonance has the ability to completely neutralize any fonon. Luke gains the ability to