After setting down the heavily strengthened version of Scrael's leg, Toz went to go check on his sword.
Seeing what happened to Scrael's leg made Toz curious about what would happen to his sword if he infused it with void mana. Maybe even space mana while he was at it. He could only hope that it wouldn't matter that the sword had already gradually become mostly wooden.
But Toz wasn't that lucky. It seemed like the sword wasn't interested in more mana while it was undergoing the wood transformation. But it might have been just as well since Toz could refine his space element as well before making yet another sword.
Even though Toz spent most of his time training his space mana, he spent the occasional breaks working with his void magic and figuring out how to combine it with other elements and how to combine other elements with the help of void magic.
Since he would figure out how to use the space element as he used it, Toz put void magic as his priority.