The summon familiar spell was taken out of the tech tree and made into a sovereign trait. Of the vanilla sovs, only Ceresa has the trait.
EDIT: Speaking of vanilla factions, Umber has 1 too many points spent on their traits. Either they need to lose Master Scouts, or get a drawback to bring them on par with other factions. Or (better) get rid of Stealthy and replace it with a new trait that lets them train Naja and Ophidians like Cult of a Hundred Eyes.