Toz's recently gained insights didn't help him make his spell more mana efficient or restructure it to become better.
The more he thought about it, the closer Toz felt to the answer. But it also felt like the closer he got, the further he would have to go to finish his spell.
Unless darkness was completely alone, it always took the shape of other things. Even shadows took the form of what they shadowed. Toz wondered if maybe that was why his spell cost so much mana. He was trying to mold and shape an imitation of the entirety of the Void to fit a single being. Even if it was just an imitation, and one Toz created at that, the Void wasn't something a person could control.
Toz realized he could go the other way. Instead of enveloping his target in an imitation of the Void, bringing the Void to the target, why not bring the target to the Void?