Are you here to cause trouble?

"Throw him out!" Brother Wolf licked the blood on the dagger, and then inserted the dagger into his lower back, as if he had done something insignificant. Then, he said to Su Nantian: "Brother, let's go in and talk!" "good!" Reuben Su nodded, then followed Brother Wolf and left. Looking at the backs of Wolf Brother and Reuben Su, everyone was shocked to the extreme. How is this going? Why did Brother Wolf become so polite just because I recited a line of poetry? Is there some mystery in this...