"That's odd." Regulus frowned again, thinking about his own recent troubles. "I have had spells go wrong too. I thought it was a problem with my wand, not my magic, but if you are having difficulties as well, perhaps it isn't my wand after all. Could we both have the same disease?" He was musing more to himself, stroking his beard thoughtfully. "Some latent Black family affliction wouldn't be out of the question, I suppose."