Ternion (FrostIronStrange)

A year after Tony has saved the universe, he's approached by Thor for a favour. Build the citizens of New Asgard an arc reactor to mitigate the drain on Midgardian resources. He could use the distraction from the shambles of his life. The breakup with Pepper, his mind plagued with nightmares and self-doubts... his growing infatuation with Stephen Strange.

Stephen never told Tony exactly how he saved his life in the aftermath of Thanos's destruction. He never broke rules, especially ones pertaining to natural law. Except...he couldn't stand by and watch the man he'd fallen in love with over countless timelines die. Now, despite their obvious feelings for each other, he's too scared of telling Tony exactly how he'd saved his life.

Now he has to watch the man he loves fall in love with another.

Loki is trying to carve a new life for himself on Midgard, untrusted by his people and those of the planet which offers him sanctuary. When he learns that Tony Stark knew of Thanos's manipulations involving the Sceptre, they strike up a friendship, leading to an aching fondness and affection for the mortal.

Then Stephen Strange warned him away.

Loki always wanted things he couldn't have.