"Good thing indeed, although you have two. Narcissa is quite the Slytherin herself." He nodded. "We can certainly do that. After all, we don't want these things going into the Muggle world. I wonder who's been taking care of keeping the magical creatures hidden? Did the other ministries send people to clean up? Where are the dragons from the reserves? What will they do if they find out that we're screwing with time? We need to thread carefully." He stopped as they reached the greenhouse. "You know, if Dumbledore had trusted all houses, things would have been a lot different. We all work better when we put our heads together."
He smiled. "What we need is a Ravenclaw who starts writing everything down and make lists so we can prioritize." Not that Regulus couldn't do it himself, but he had committed to this theory of house blending. "This would not be a good time to mention how much I hate Dumbledore, would it? Why not leak that? It would have stopped his ascent before things got out of hand. Sometimes I feel like his driving force was pushing away the Slytherins regardless of the cost."
Regulus couldn't believe that he was agreeing with a Weasley, but then this particular Weasley was different. "It's funny, you're more Black than Weasley. Rather ironic, isn't it? I still think there's a reason why so many Blacks." There was so much he didn't know. "A list would help for future arrivals, but it's not urgent. Is there anything you think I should know now? Especially about the people here?"
That answered the question about trusting Narcissa. "No, they wouldn't have given all the names. You keep leverage; it's the smart thing to do. Still, it seems that everyone here seems to be firmly on the side of killing him on sight. I doubt Narcissa would want to explain about her change of heart."