Can’t find Shrapnel Munitions as the Unfallen 5 years ago

I'm playing a game as the Unfallen and am looking for the tactics card Shrapnel Munitions but can't find it in the tech tree. Is this card unavailable to the Unfallen, has the card been removed in a new update, or am I simply lost and if thats the case, where is this tactic card? Any help would be appreciated.