- Harry has brought the memory to Dumbledore, and they drop it in the Pensieve. Here we go…the moment we've all been waiting for.
- We dive into the memory, and Tom asks Professor Slughorn about a bit of rare magic called a Horcrux. A what?
- Slughorn explains the concept to him (and us): it's basically a way of ensuring you cannot die by giving an object a little bit of your soul. You do that through murder, which rips the soul apart. Charming.
- Tom is most interested in knowing how you make a Horcrux, and wonders if you can split the soul more than once. Like, say, into seven parts.
- This makes Slughorn very uneasy and the professor tries to confirm that this is a theoretical conversation/question. Baby Voldemort (unconvincingly) says yes, of course, just asking for academic reasons. Sure.
- Coming out of the memory, Harry and Dumbledore discuss the implications of what they just saw. Whoa, it's even worse than D-dore thought.
- Luckily, Dumbledore reveals that that they already have two of these objects in their possession. One was Tom Riddle's diary, which Harry brought Dumbledore back in the Chamber of Secrets, and another is a ring, which Dumbledore says has been very difficult to destroy. Oh, so that's how Dumbledore hurt his hand.
- So if they could find and destroy all of Voldemort's Horcruxes (Horcruxi?), they could kill Voldemort. And this is what Dumbledore's been up to on his mysterious travels. Dumbledore thinks he's found another, but he can't destroy it alone. Looks like Harry's in for another dangerous adventure.