Brilliant light filled the entire compartment. Even without a Patronus appearing, the mere brightness surpassed that of the few upper-year students who had successfully summoned corporeal ones.
And it was remarkably effective!
Although the many upper-year students using the Patronus Charm had also achieved some results, at most they could only drive the darkness out of the compartments. Each person could cover only a limited area, and they were clearly short-handed.
Even the few older students who could summon corporeal Patronuses could only make them run around in circles.
Wherever they went, they could dispel some of the darkness, but it crept back as soon as they left. They could only keep running back and forth, using up their magic.
But Tao Yu's sudden burst of light cleared a considerable area even outside the train carriage he was in!
"Unbelievable! A young wizard can cast such an impressive Patronus Charm!
"It's an extremely difficult spell, and he cast it remarkably well. But why didn't a corporeal Patronus appear? That's unusual."
Quirinus Quirrell's eyes narrowed. The shock seemed to have even eased his stutter.
"I don't know either. Maybe it's because I'm young."
Tao Yu replied calmly. His body had been created from a fragment of this world, after all, so it was only natural that his magical talent was exceptional.
Bathed in the light of the Patronus, Harry, who had been deathly pale and on the verge of fainting, suddenly came to. Then, looking horrified, he said,
"I think I just saw what happened to my parents right before they died. God, it was awful."
Although he was conscious again, Harry was drenched in a cold sweat. Ron watched him with concern, handed him a glass of water, and comforted him.
"Don't worry. Tao Yu's spell seems to counter this.