So Cassiopeia confirmed as a Darkin?

“Warding sigils. Potent once, but faded,” said Varus, crossing the inscribed flagstones to where a towering statue of a great serpent-headed god had once stood sentinel. Some past catastrophe had toppled it, and beyond its sandstone remains lay a lightless chamber. Varus entered, the glow from the smoldering light at his heart revealing nothing but bare stone, burned black and glossy with ancient fire. Varus sighed. “Where are you, sister?” he said."

Quote from the new Varus lore.