User blog comment:JayeMalik'/Pregnancies in Hogwarts (and Clairvoyance)/@comment-1613839-20160802180719/@comment-1613839-20160802181500

Or just put a 1/user limit on them, like some of the other exotics have had (I know werewolves and vampires both did at one point) so each user can only ever have 1 active character with those exotic traits.