No, he's definitely real. My father used to tell me about him when I was learning to fly. He'd say. 'Flap harder! Imagine the Darkstalker is chasing you!' or 'If you can't twist into a dive faster than that, the Darkstalker will catch you and rip off your claws and eat your brain!' He told me about how the tribe buried him a long time ago and they ran away to hide, but he's slowly clawing his way out, and one day he'll break free and come to kill us all for revenge.