"A pleasure." He has the decency to sound a little wry about it, but, the bar is somewhat low, there. Lucius gives one final glance about as if to survey the damage done and finding it to be satisfactory enough.

And it's true; his nature is to advise, and offer suggestion, and coax others into taking the lead, and following. Which doesn't make it not his business, when he adds, "I'll be interested to see where this leads." And with that, he takes it upon himself to go; reality bends a little around him in Disapparition, and he does so silently.