'Life's Blood' is a Samsaran racial Feat from the ARG, and yet for some reason characters of the race can't take the feat. I did a temporary work-around by activating the house rule to bypass feat prerequisites, but I think there's a bug in there somewhere.
PRERACE is looking for "Samsaran.". Note the period within the quotes.
Seems to be a recurrent issue, another PRERACE had the ending period too. Fixed both.