Truth

Professor Lucius can understand Leonore's reaction. However, this matter isn't as simple as that.

He looked at everyone with calm eyes before he answered. 

"The Mystical Artifact that was destroyed was a rare Ancient Sword. This sword was spilled with the blood of numerous Evil Creatures, Wandering Spirits, Arcane Arts Practitioners, and even regular humans… The curse that has been spread wasn't visible or tangible to anyone… The curse had culminated inside the affected person's body for at least three days before it showed any reaction."

"Three days?" Neil and the others repeated in a soft voice.

"Yes… Those who passed through the sixth building near the stable were the ones that were first affected. That building is where the Treasure Vault is located and where the Ancient Sword was destroyed."

Professor Lucius paused for a moment before he continued.