Then, Hal, following his agreement with Ye Xunhuan, slowly walked to one side of the rooftop, took out a black bottle from his body, placed it on the ground, and raised his hand towards Ye Xunhuan, saying: "Marshal, I've put the stuff here, you can come and take it!"
Saying this, Hal stepped back to the side.
The distance Hal retreated was not far from the bottle he placed on the ground.
He had to make preparation, after all, Ye Xunhuan was too powerful. If he retreated too far, and Ye Xunhuan killed Di Xi with a sword then went to get the antidote, what would he do?
So, Hal controlled the distance very well. As long as Ye Xunhuan killed Di Xi, he would destroy the antidote immediately and then escape.
If Ye Xunhuan really let Di Xi go, then he wouldn't be foolish enough to destroy the antidote.
Doing so would only anger Ye Xunhuan, making him attack them again and kill them one by one!