Legacy of the Dark Sage
When Kyran turned 18, his life turned upside down. The Royal Army raided his clan because his supposedly non-existent magic got exposed. On that fateful night, he was the only one who escaped. Up to the present, the status of his clan was unknown. A magic inheritance that became a curse, Kyran became a fugitive. Always on the run... living in fear when the Royal Army finally captures him. At least that's what most people thought... "I'll definitely save my family. And I will make all those who made my clan suffer pay tenfold. I'll make use of this magic they so feared, and show them what real terror is...." Disclaimer: The cover image isn't mine. I'll replace it when I finished mine.
Speculation
Ignoring Dilitrio's outburst, Kyran launched a sudden attack. His target was not Dilitrio, who was retreating to gain distance, but the floor beneath them.
BAM!
The floor exploded, creating a crater almost the same size as Dilitrio's Area magic.
Kyran did not destroy the arena to counter Dilitrio's Area magic or to increase the low visibility. The additional cloud of smoke and commotion would not affect the senses of the dragons watching from the audience or the hovering platforms. Instead, he destroyed the arena so he could force Dilitrio back while he prepared a surefire move to force everyone's gaze away from the arena.
With Dilitrio's poison negating Kyran's use of Draconic magic, he could not use it. Thus, instinctively,
Kyran used the Void mainly because it was the magic that could easily counter the poison's effect. However, that was not the only magic at his disposal.