Complex sentence: She was removed from her parents and trained to be one of Darkseid's "Hounds" (his elite soldiers); as the final step of her initiation into life as a Hound, she was told to kill her beloved pet.
Split into simpler sentences: She was removed from her parents and trained to be one of Darkseid's "Hounds" (his elite soldiers). As the final step of her initiation into life as a Hound, she was told to kill her beloved pet.