The two of them are about two miles away from each other. They're not sure if they're hostile or not, but they don't have a lot of time to kill each other before it's too late. They decide to negotiate first, since they've had no luck with the negotiations. They want to get through the mountains without anyone noticing that they can't "transform" . They also want to make sure that no one tries to cross the mountains, because that would be a violation of the laws of nature. If they do, they'll be killed. They have already killed three of the enemy's soldiers, so they'd be better off killing one of their own. He's not going to let that happen. He wants to fight one on one with the enemy. He doesn't want them to be collateral damage, so he's going to kill them all. He also wants to give them time to prepare for the fight. He says he'll still chase after the enemy, even if he has to run away.