Nonexistent Physiology refers to the ability to exist as in a state of nothingness or in a state of general nonexistence. While those with this ability continue to “exist”, the state of their being is that of nothingness on one level or another. In essence, this is an ability that makes the user extremely hard to affect, and some might not even be perceptible at all.
Type 1 - Material Nonexistence: The lack of any conventional existence. Such a character will exist as something beyond the normal scope of the physical and metaphysical worlds, instead existing as an idea or other unconventional state. Such entities can be conceptualized by individuals, but do not exist in a physical or normal metaphysical form, such as a soul. Abilities such as Void Manipulation or Conceptual Manipulation (Type 2) can interact with such beings.
Type 2 - Conceptual Nonexistence: The ability to exist as a completely nonexistent being, being composed entirely of nothingness on a conceptual level. Such entities are typically presented as primordial voids or pure emptiness, or any abstract state which precedes or opposes the state of existence on all levels. In terms of binary, this would be something that is neither 1 nor 0, where 1 is existence and 0 is nonexistence.