Mould-on-the-Wold
Voldemort waited until nearly half past 3 to make his move. He needed time for the Order--and especially the Old Fool--to find out about the attack and to engage his Death Eaters. But after today, he would not need to worry about the coddy bastard any more.
Shrouded by invisibility, the Dark Lord appeared at the cemetery's entrance and made his way forward. He resisted the urge to force the nearby Muggles to bow to him. Their irreverence toward the Lord of All Creation would have normally resulted in their deaths, but He paused today from that normal routine, paused only by the anticipation of what awaited him.
When he found the tomb of Arianna Dumbledore, he approached with caution, checking for signs of latent magic. Once he was safe, he became visible and raised a confundus charm, so no one could see what he was doing. He held his hands over the grave site, with palms down. Steam rose as the decades of compacted dirt evaporated. The casket rose to the surface. With every inch it rose, Voldemort could hear his destiny drawing nearer.
Somehow it was fitting that the last stage of his ascension to power would involve the desecrated grave of the sister of his arch nemesis.
He removed a vial from his robes and poured the unicorn filly's blood over the top of the casket. Opening it, he removed the contents he had stored there all those years ago. He ran a finger along the decayed remnants of Arianna Dumbledore, thanking her for her service to the Dark Empire.
Lord Voldemort laughed as he stared down at the grave, the Old Fool's means of stopping Him had been under that Crooked Nose and the Old Fool never knew it.
He dropped the confundus charm and strode out of the cemetery. Before he left the village, he set fire to many of the houses.