Existence Erasure is the simple power to remove something from existence, leaving nothing behind, a level of destruction beyond incineration, vaporization, and atomization. Rather than just reducing something to its constituent parts, this ability leaves absolutely nothing behind. Powerful enough uses of this ability can even erase the mind and soul, if not more fundamental aspects of one's existence, such as concepts.
This ability's destructive power is not absolute, and one should not assume that it can erase the soul by default. It can only be judged by what it has accomplished, and one's resistances to the ability can only be judged by the specific method by which this effect is achieved. The means vary from character to character, but the ability is often considered and listed as a subset of Void Manipulation, though it can certainly occur through the usage of other abilities.