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  1. Invariant by

    Fandoms: Marvel Cinematic Universe, Thunderbolts (Movie 2025), Captain America (Chris Evans Movies), The Falcon and the Winter Soldier (TV)  

    14 Feb 2026

    Tags
    Summary

    On a routine Thunderbolts mission, Bucky finds a dead SHIELD archive that was never meant to be opened, half-finished research, missing conclusions, and blood taken from a man who was frozen in ice.

    Language:
    English
    Words:
    4,905
    Chapters:
    5/?
    Collections:
    1
    Comments:
    18
    Kudos:
    32
    Bookmarks:
    3
    Hits:
    341