Nice drabble. :) I liked Snape being "another shadow". I liked the allusion to events in the first book and I liked how you added <i>"Tracking is not impossible, no.</i>" Thanks for sharing!
What does the mean? "I examine his presents three hours before the dawn. <i>Inside the warded circle, I wait for an explosion.</i>"
Author's Response: I was trying to say that Snape was the one Dumbledore assigned to protect Potter, including making sure the gifts sent to him for Christmas aren't trapped with explosives or curses, or other nasties.
Writing a drabble is a lot harder than I'd thought. :) Getting across the point that Snape is the one assigned to protect Potter, and does so in the shadows while Dumbledore is the one who talks to Potter and pulls the strings of everyone, and all in 100 words (!) certainly took longer than I thought it would.
But thank you for enjoying this! I think I'll fix it up a bit, tighten and clarify the wording a bit more...