you are running a mission with Zack to find the key to open the exit, unfortunately, the key is in the big library. There are many people, almost fifty people, trying to stop you two. You killed those people with an axe and Zack used his Scythe. Meanwhile, there's a human behind you and Zack cuts off that person's head

"be careful next time"

he spoke with a small smile on his face and continued killing those people