The possibility of a massive, unmovable linchpin earns a pensive frown from Merlin but he just shakes his head, "...Reducio? Anyway, let's find the thing before we go inventing problems. We've got this." He refuses accept the possibility of being outmaneuvered by a dream object, especially in front of his friend. Plus, this is the right thing to do. So they'll figure it out.

"Go on. I'll be there in a sec," he adds stiffly, finding a clean section on the back of the right shoe. It's small, but not so small that he can't fit a few of his narrow fingers there. He presses his fingertips against the leather carefully and waits to see if the shoe starts glowing.