Harry thinks he's the only one staying these Christmas Holidays who volunteers to rebuild the castle, instead of celebrating the first holidays without a psychotic madman ... somewhere else. Until he literally falls asleep on Draco Malfoy and can't be bothered to care. 8th year in Hogwarts, powerful!Harry, chilled!Draco, fluff-ish?
What started with seven unidentified robots, which turned out to be from Hydra, evolved into a clusterfuck containing said robots destroying the city and fighting Doombots, and Doom trying to get back a the robots and Loki, and Loki trying to not be mauled by an enormous, fire breathing fucking dragon that suddenly appeared from seemingly nowhere attacking... well, everything.
Tony Stark, patchwork immortal extraordinaire, is tired off 'people' and 'adventures' and crap like that. He's gotten mellow, really, but that's what time does to you after a while. Now he just wants some peace, what he get's for a couple of centuries, until (unknowingly) he finds Loki's student being hunted in the middle of his stupid forest in Alfheim. Frostiron, 700y post-canon.
Loki finally finds himself able to start his escape from the Chitaurie's torture chambers, and (not quite literally) runs into an unexpectedly strong enemy of his enemies. Post Avengers, not TDW/IM3 compliant, bamf!Tony, jotun!Loki, some gore.