If he had to guess, Heine would say that's why he's having trouble with wandless magic now, but it's based on instinctive reasoning rather than any research. But if Jade wants to learn, it should still be possible. It also bothers him less than the prospect of Jade learning more hexes and forbidden magic.

"You don't need a wand to do any magic." His own wand is sitting in his pocket; after a pause he takes it out and turns it on its axis on his desk, watching it spin and trying to figure out how to explain something he's been taught since birth. "What can you do without yours so far?"