According to some people, the darkness described in the
scan IS pure darkness magic, hence "darkness = void".
But, it is VERY obvious that what is being used
here is nothing more than a sub-skill of Darkness Magic, also known as
Nilithy, a type of magic that SUMMONS (uses) the void that IS IN HELL in its "attacks".
Nilihity magic is described as a type of magic that
SUMMONS the void of hell;
The
ability used in the scan says that the void is being summoned from the abyss (the abyss is hell).
Therefore, the magic used as evidence for "darkness = void" is just a magic that invokes the void that is in hell, invoking the void of a place with a spell obviously does not prove that this magic is non-existent (void).