In actuality, the second prince didn't want to use the item that Jin Rou gave him. After all, he still didn't trust that man even if he was telling the truth. As someone experienced enough, he knew that Jin Rou wouldn't something like that if there was nothing for him in it.
However, he couldn't put what it was. What would that man achieve by fighting them out with his eldest brother? Was he trying to aim about the throne? That's wasn't possible, since outsiders weren't allowed to compete in the first place. Besides, Jin Rou won't be someone who was a bastard son since he knew that his father was greatly devoted to their empress mother.
Anyway, he had no choice but to grit his teeth and use it. As the second prince, he wasn't willing to give up the fight just like that.
"Give up and die, Second Brother." The first prince said with a confident tone, "You aren't a match against me. It's futile resisting."