Unbreakable
“I have your word that you will do all in your power to protect the students of Hogwarts?”
Snape gave a stiff nod. (DH33)
*
“Will you, Severus, watch over my son, Draco, as he attempts to fulfill the Dark Lord’s wishes?
... And will you, to the best of your ability, protect Draco from harm?
... And, should it prove necessary… if it seems Draco will fail… will you carry out the deed that the Dark Lord has ordered Draco to perform?” (HBP 2)
How did our clever and cautious arch-Slytherin let himself get manipulated into doing such a foolishly Gryffindorish thing as to make an Unbreakable Vow with Draco’s mother—and without so much as requiring her first to spell out her terms?
Had he learned nothing at all from his previous blank-check dealings with Tom and Albus?
( Oh )