I think this is an interesting start to a story. Of course, since 'either must die at the hand of the other', it means that he can't have died. However, you've stated that Harry's having a 'dirt nap'. So... Necromancy?
Author's response
Sorry, no Necromancy here. As BJH pointed out, kinda hard to bounce back from gunshot. Stay tuned for more.
Dexi