Byron watched as Tsundria drove her griffin away and didn't try to do anything at that very instant. He wanted to see her disappearing over the horizon before he could unroll his sleeves for the tricks hidden there.
To his surprise, she didn't disappear. Instead, he saw her making a U turn, speeding toward him as if she had forgotten something very important.
"Realized you're being a bitch?"
She didn't say anything at his question. She just did what had brought her back. It was to tie him on a boulder nearby.
Once again, her rope did it on its own as if possessed. This made Byron question his plans. Remember that he was planning to cut the rope. Would she be able to know it if the rope was distroyed?
No way!
Considering the fact that she turned around just to have it tied around the boulder, he could tell that her control over it had some limitations. Maybe she was able to do it only within a couple meters range.