I can't remember the beginning but it was a longer fic, and incomplete. Loki is at the battle of Wakanda and is with Thor when the Snap happens. Everything goes as in the movie but Thor also turns to dust and Loki is left with the Avengers. There is a scene where everybody is trying to figure out what to do next, Loki walks away and screams.
Loki then goes with them into the city and they are working on a plan to find Thanos. He carries Stormbreaker with him everywhere. Loki says there is a tear where the snap happened and he can see it, use it to locate Thanos. He goes there with Natasha and the chapter ends with Loki getting punched by somebody as strong as Thor.
If this is familiar to anybody and you could post the link that would be fabulous! Thanks bunches in advanced.