Fics like The Wake of the Flood

While exploring a bunker that's been sealed since the time of the Old Ones, Aloy discovers an unnaturally well-preserved body that, to her shock, returns to life. Now unexpectedly accompanied by an immortal man from the distant past, Aloy strives to learn about him and about a history she's only glimpsed before, while introducing him to a world that bears little resemblance to the one he remembers.

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