Snape inwardly cursed as Dumbledore's order got to him. He had nearly finished concocting a special potion that should work on Ivory. Letting it simmer, he began doing his research into this dark creature. Even with his expert knowledge of the Dark Arts and Dark Creatures, he had no idea what Dumbledore had detected. Snape feared it was a trap Voldemort had set up to lure Dumbledore away from the school. If so, it had worked perfectly. Snape cursed. Why didn't Dumbledore consult him first?

Knowing he had no choice but to forgo his plans to seduce Ivory, he began mapping out a defense, should the Demon prove able to break Dumbledore's protections on the school.