You're Irreplaceable

After the illusion disappeared, the lobby fell into an eerily silence.

After a while, Scroll finally sighed and said, "No wonder your sister fell over in shock. That's quite... terrifying indeed."

"The ability to place an entire group under an illusion is very rare, but not new..." Agatha said slowly. "When I was in the Union, I knew at least two witches with similar powers, one of which was a Senior Witch from Starfall City."

"How many times can you use this ability every day?" asked Wendy. "Can you control the specific time period that the illusion shows?" According to His Highness' usual practices, there should be a comprehensive test of her ability that sought to understand its characteristics, efficacy and usage.