A Match Made in Hel(Heim) (слэш)

Tony and Loki now have their little unconventional family. But there's still the little matter of that final step they need to take--and Tony will soon learn that even for a genius, billionaire, ex-playboy, philanthropist, more surprises can always pop up, especially when said genius has just become the happy fiance of a certain God of Chaos.
Okay, so he hadn't actually considered Helheim of all places for a wedding venue, and he'd never thought the Queen of the Dead would be the one to officiate the ceremony. And okay, Helheim comes with so much baggage he couldn't even carry it in the suit. But it's fine. Tony's got this. After all, he definitely has the right incentive.