One of the few things he actually feared, yes, because a big part of him wanted it. Also... it meant that not only would he become Mother's creature again, but that he would have no choice in following her lead, wherever that would go. There would be nowhere to escape to. There would be nothing to want to escape for.

He kept on walking, though. Damian knew Grayson would get it, eventually - he didn't want to stay there, the sight of the archway reminded him of the way blades sank into flesh...

"I have not actually done that... yet. Maybe."

And if Grayson didn't get it, all the better. Distance from him right now probably was wisest.