Fics like A Heart as Cold as Iron

When Thor bursts into Stark tower in desperate need of help Tony Stark is unwittingly forced into caring for a horrifically brutalized Loki, changed beyond recognition. With help from the avengers can Tony save the broken god and maybe even help himself?

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Journey To The Past by melonbutterfly (The Avengers (Marvel Movies))
On Silent Paws by silver_drip (The Avengers (Marvel) - All Media Types)
More Than Meets the Eye by LokiNeedsHugs1031 (Thor (Movies), The Avengers (Marvel Movies), more)
This is Gospel by TheAdventures_of_Me (The Avengers (Marvel Movies))
Ignite (The Avengers (Marvel Movies))
The Other Road by Mysticmcknight (The Avengers (Marvel Movies))
for a hundred visions and revisions by aventria, iluxia (Marvel Cinematic Universe, The Avengers (Marvel Movies), more)
Watched the world tear us apart by Skoll (Thor (Movies), The Avengers (2012))
The Fall of Loki by Obsessed_Reader (Thor (Movies), The Avengers (Marvel) - All Media Types, more)
The Historian by Yeah_Toast (Iron Man (Movies), Marvel Cinematic Universe, more)
Blood and Iron by dracusfyre (Marvel Cinematic Universe, The Avengers (Marvel Movies), more)
Revealed in Discovery by ragcat (Thor (Movies), The Avengers (Marvel Movies))
Betrayal by stridermagic (Harry Potter - J. K. Rowling, Iron Man (Movies), more)
Under Starry Skies We are Lost by Emilia676 (Thor (Movies))
Stolen Relics by Kadorienne (Thor (Movies), Iron Man (Movies), more)
Never mess with the greatest Serpent known to man. by Sagiri (The Avengers (Marvel) - All Media Types, The Avengers (Marvel Movies), more)
Tony Stark Collector of Strays by MysticMedusa (The Avengers (Marvel Movies), Thor (Movies), more)
Good Times, Bad Decisions by Astrum_Ululatum (Marvel Cinematic Universe, The Avengers (Marvel) - All Media Types, more)
Road For Home by in_the_bottle (Marvel Cinematic Universe, Thor (Movies), more)
Yours for the Duration by STARSdidathing (Marvel Cinematic Universe, The Avengers (Marvel Movies), more)