Complex sentence: Black Hat reveals that he was among the Priests who were defeated in the final wartime attack on the vampire hive at Sola Mira and that after being captured, the vampire Queen gave him her blood, turning him into the first Vampire-Human hybrid.
Split into simpler sentences: Black Hat reveals that he was among the Priests who were defeated in the final attack on Sola Mira. After being captured, the vampire Queen gave him her blood, turning him into the first Vampire-Human hybrid.