A Change...
The drop of blood was already on Quinn's finger, but after seeing the message, he hesitated to consume it. It had only been a little after 24 hours, and his HP would now start to decrease if he didn't drink any more blood.
'Is this what Fex was talking about? Have I already started to become an addict?' Quinn thought.
He started to wonder if he continued to go down this path, how sooner would he need blood later? Will it get to the point where blood would need to be consumed every hour. In a way, he was lucky that he had caught it now.
It was only because of Fex's message he had decided to be even pickier with his victims. He was trying to select an O blood group person who also met the condition of being a student and alone.
This caused him to select someone a little later than usual. If he had taken the blood at his regular time, he would have never received the message and would have continued onward until the tournament.