It's not the magic but Negative Energy. Since Negative Energy is the annihilation of existence aka nonexistence.
Where exactly was it accepted that negative energy is accepted as NEP2?
Furthermore, even then, evidence would be needed that "Darkness = Negative Energy".
Idk why you're using the wiki when they can be wrong. Nihility Magic is a higher form of Dark Magic that manipulates the Great Spirit of Darkness. Negative energy is
described as darkness. And Nilihistic Banish is said to manipulate the void.
It's 100,000 times easier to trust someone who describes skills according to the story just to give information than to make the verse stronger, in addition to the scans you sent saying that
Nihility is a magic that invokes the void of hell, and there is also a scan literally saying that the
void of magic is coming from hell, which further reinforces what is
written in the Tensura Wikis.
Now focusing on your evidence, Nihility Magics use the void of hell as far as we know (which is said in the
scan and in the
Tensura Wiki),
Nihilistic Banish being a Nihility Magic would do the same thing, it would be necessary to prove that the void in Nihilistic Banish is not being summoned from hell.
The fangs having "darkness" in the name does not prove that the void is the Darkness hiself, Nihility Magic (magic that INVOKES the void, and NOT that IS the void itself) itself is already a Darkness Magic, having "darkness" in the name only reinforces that it is a darkness magic.
Negative Energy comes from Hell or the Underworld. Which is a realm of darkness. And
Darkness = Negative Energy.
This scan literally talks about magic using the void of hell (summoning), this is literally evidence that goes against your argument.
Nothing says that "Darkness = Negative Energy".
Is necessary one evidence that "Darkness = Negative", which I believe is not the case, since Negative Energy is said in the
Tensura Wiki to be something from Nihility Magic, which is also the the only one that uses void of the hell, so I think it would be "Negative Energy = Void" and not "Negative Energy = Darkness".