Remus Lupin

And this information about Horcruxes is most interesting.

Is it something that can be re-used over and over again until destroyed?

I must admit, the thought of Harry creating one of those dark objects... I am very glad it was unsuccessful.

Given that insight, however, it makes me wonder more about Harry's intended role in the ceremony, and I don't like where it takes me. Sirius, we must talk to him about his options so that he isn't put in that position in the future. He's had two close calls with this sort of thing, and we can't risk his being involved in a third.