"You know, Severus, a true Slytherin would have found out the abilities and, most important, the capabilities, of someone before he made an enemy of them. But then, with your bullheaded refusal to let facts change your dearly held prejudices, you are more of a Gryffindor than a Slytherin. I bet that when you imagined how you'd die, you never thought that it would be at the hands of an 11 year old boy, who you abused and belittled for the entire year. Well, imagined or not, your death is here, in the form of a bubble of air. Now, an air bubble is ordinarily quite harmless, but, when placed in the human bloodstream, it causes a massive heart attack. So, goodbye Severus, enjoy your eternity in Hell, I'm sure I'll see you there eventually!" Snape felt a prick at his ankle and then felt sensation returning to his limbs as the spell was released. "Potter!" he gasped as the bubble hit his heart and the disruption caused it to stop, permanently.