Belov

Hailing from Russia, this clan was defeated. Their ruby allows users to walk in sunlight unharmed. Their ruby was lost in the Clan Wars, resulting in a vampire's vulnerability to the Sun's rays as one of their species' most pronounced weaknesses; back then, they were said to be allied with the Grimur. And to prevent their ruby from being stolen, the Belov buried it in a tomb and then implored the Grimur Clan to "bless" that burial place with near-perpetual daylight that only dims in the presence of actual sunlight.