The 'mission from Glod' thing gave me the mental image of Ron and Harry trying to sneak a piano past a random Death Eater (perhaps Mister Brutal?).
Also: Good God, Kendra Dumbledore really could be Kendra the Vampire Slayer, from what I remember. Perhaps she didn't so much die as get time-warped? (For triple crossover fun, it was those stone angels from Doctor Who...)

And aren't house-elves supposed to be incapable of harming wizards directly?
Clearly, house elves aren't bound to the Three Laws of Robotics.