Unfortunately for Toz and Asilean, void magic wasn't as absolute a counter to the Adaptation Trees as Toz thought. It was a shame, especially for Asilean, who noticed it when his two-pronged attack on one of the trees failed.
The void magic only prevented the Adaptation Trees from absorbing the nearby mana. And with enough force, it could also expunge the previously absorbed mana as long as the tree wasn't already finished adapting.
As soon as he pushed the death attribute out of the tree he had chosen, Toz saw leaves begin sprouting almost at once, but there wasn't any other significant difference. Though after a while, the tree stopped rampaging, and it looked like it settled down to absorb the surrounding mana.