Sirius shot a worried look at Harry. Harry's spells were more reliable than most people's, these days, but they no longer made the impossible look easy. Sometimes they didn't work at all.
"Maybe you should call some old friends first," he suggested. He wasn't sure if Harry had ever told Regulus about the Order of the Phoenix, and now wasn't the time to discuss it. "With the fluctuations in magic, I think even you may need more of a plan than that."
He looked back at Regulus. "We may want to talk to Serenus, as well, and see if there's some way to neutralize the Dark Mark, so no one can use it to find you or to-- to hurt you." He had nearly said torture.