As Toz wanted, he got a close-up experience of the fascinating attacks from the blue cat. But he didn't have time to do anything other than guess that it was probably the space element. The current situation didn't allow Toz to leisurely inspect the magic attacks of others since he was busy launching fireballs like a pyromaniac.
The majority of the void beasts in the swarm were low and medium level ones, so they died from only the waves of heat that the fireballs' explosions created. High level ones, on the other hand, needed to either be close to the explosions or receive a direct hit for them to die. However, the flames and power of the fireballs were buried under the incredible mass of a seemingly endless amount of void beasts.
Thankfully, Toz had a lot of mana and could afford to unleash fireball after fireball. And he wasn't alone either. Although Nil, Lucy, and Scrael weren't having an easy time attacking the void beasts, Mindle's attacks were extremely effective.