And then, standing there, he realizes he could die.
The wand that, he believes, has made him invincible is gripped in his hand, the handle somewhat cold under his palm even after being there for hours on end. Bellatrix's corpse lies nearby, still and lifeless, his best lieutenant knocked down by a dumpy housewife-
The boy is nothing, he tells himself, even though his pride is cracking as he screams. He is nothing, and you will kill him. You will rein supreme.
He shouts the words, the end to this terrible annoyance, and the boy shouts-
"Expelliarmus!"
He almost laughs; it is ridiculous, how the boy expects such a measly, useless spell to save him. But then the green comes flying back at him, and for a moment the bloodcurdling scream of Lily Evans fills his ears, and the useless woman's scream is paired with a pale, lank-haired face, with the pitiful name Merope-
And then green swallows him, surrounds him entirely, and an unfamiliar yet knowing voice fills his ears.
"His name will be Tom Marvolo Riddle...I hope he looks just like his papa."
He opens his mouth to scream in denial, but there is no time; he is already gone.