How does he arrange for Draco to go to a Silver Slytherin meeting at exactly the right time to get caught by Filch, and then for Filch to give Draco that precise detention? That’s a lot of Imperiuses or other manipulation.
He just needs to know about SS meeting beforehand and tip off Filch about it without linking the tip to his ID. Only one hard manipulation here, which is to suggest a specific detention.
How does he arrange for Draco to go to a Silver Slytherin meeting at exactly the right time to get caught by Filch, and then for Filch to give Draco that precise detention? That’s a lot of Imperiuses or other manipulation.
He did it with hermione, no?
He just needs to know about SS meeting beforehand and tip off Filch about it without linking the tip to his ID. Only one hard manipulation here, which is to suggest a specific detention.
And that could probably be done with appropriate False Memory Charm.
He’s got to have a time turner.