Microchimerism results when stem cells from a fetus cross into the mother’s bloodstream and differentiate into other cell types in various tissues. A mundane mother who carried the child of a supernatural being with regenerative powers could live normally for decades... until a course of chemotherapy took out enough of natural cells that the child’s cells started filling in. Suddenly you have a middle-aged or elderly mother developing powers...

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A Mastodon instance for tabletop gamers.