seeking_spike | Xander/ Anita Blake x-over

Searching for a fic set in Anita Blake universe. I remember that Dawn preformed a spell and the backlash killed xander, but he was sent to Anita Blake world. I think he was magical? He helped Raphael get his children, helped Edward with something (I believe they have sex and then someone gets him a cake shaped like a butt), he may reanimate zombies. That's what I can remember. I hope someone knows the fic, it's been driving me crazy!

I found it. Link in comments. A+ fic if you haven't read it yet.