Kindred Most Wanted introduces a new clan: Abomination. The members of this clan are printed with the Scarce and Sterile traits. The rules for those terms, and others, are collected section 11 of the new KMW rulebook.
The default sect of an Abomination is Independent (in case anyone wants to impersonate one).
Note that the Abomination library card (printed in Final Nights) creates a vampire of the Abomination clan (errata to that card), so having one of those out will increase the scarce penalty of a crypt card Abomination.