Here's a twist. Thorm's daughter was a Selunite, like her father. She dies, tragically. Thorm falls etc. etc. fast forward, Thorm has come back, and with the Absolute's help, recreated or put his dead daughters memories into some urchin he's found, Shadowheart isn't the original, but being exposed to all the places familiar to Thorm's daughter is messing with her implanted memories.