"And then you called us scheming," he said, with a snort. "You really were the worse of all." He should feel more hatred, and he probably would have if he hadn't spent two years with Voldemort.
He raised an eyebrow. "So, I get to test it, improve it, while the other two stay home shagging, and I don't get to use it. It seems hardly fair. Why would I do that? I'm not even getting laid out of the deal." The teasing was easy, but then he stopped. "I didn't mean it like that. It's not a quid pro quo."
He chuckled. "Well, it's Sirius. You wouldn't expect him to do the sensible thing. I'd be surprised if he did."
Regulus accioed his cloak and put it on. "I still think that you're going about it the wrong way. It's Hogwarts that does it, some kind of dark magic, or blood magic. It has to be, and that's what you target. Apparition still means getting in and out, but this is coming from the castle itself."