He attacked with all of his might, but there was no resistance or impact upon contact with the enemy. He felt as if he had hit cotton when he struck the eye. All of his power failed to find purchase on his enemy. In fact, it felt as if he was hitting the air.
He was helpless to resist, but the opponent was able to affect him. In fact, the opponent was able to do much worse than attack him. The enemy was actually taking control of his body from him.
His body first felt electrocuted as the eye entered his body. Then his body became numb, and he became unable to feel anything in it. Finally, he lost control of his body and began falling to the ground.
He couldn't even maintain enough power in his body to keep levitating. This was something a rank 4 cultivator could do. That's how much bad the situation was for him. Unfortunately, the situation continued to go down hill from there.
