He lets go of Casper and turns to face Shang Beida. He watches as a bead of blood wells up from his wrist.

"You're going to pay for that. ... I take it you're not going to fight him." How useless. He manifests a small knife in his hand and tosses it at the other man with surprising accuracy. Casper moves to try to intercept, but he's grabbed by the back of the collar with his father's other hand.