itsy-bitsy plot-bunny: btvs/harry potter

[marbleglove]

Spike is surrounded by dementors. It's a lost cause. All the wizards and witches watch with horror as their new friend disappears from view beneath the multitude of dementors determined to have at him. And then there's a howl of pure rage and the dementors quickly find themselves decimated and no visible end to the carnage done to them, one in particular looking a bit queasy for a dementor. It was backing away as best it could from the raging vampire shouting at it. "You bastard! You stole my soul! I worked hard for that thing. You'd better give it back!"