Hushed Willows It's a hi-tech prosthesis.

Stark hadn't pried, hadn't moved too much into looking into their pasts. Instead he'd focused on their futures and what that meant for the Keep together. It wouldn't be divided anymore, there wouldn't be the endless pulling and tugging against each other. "I'm glad you guys made it though. I can't imagine how rough it was with your children though." That was a benefit too for him - he didn't have to worry about children. Not before, anyways. Now there was Tambourine and how things were going for him and for Octavia. 

"I settled here fairly quickly." He admitted. "I had met Lasher, in Donnelaith before, but I'd barely laid any tracks down when I found Octavia." Ultimately it had been a move for survival first, but after that, snowballed into wherever they were now. "If the locusts hadn't cleared everything out I might have wandered more. Learning, exploring - those are things I love." He constantly searched for more knowledge in whatever form he could get it.