He notices the presence of another quickly -- that feeling of being watched coming over him, a skin-crawling feeling that would make his hair stand on end if it hadn't already been from the latent electricity in the air.

Luka turns in the direction of the scraping sound. He's trying not to panic, imagining all the many things that could be its source. He wants to believe that perhaps it's just the child he'd heard earlier playing games with him, but deep down he knows that presence is not that of a child. It's far too imposing.

"Hey," Luka says, hiding his unease from his voice. He takes a defensive step back, but keeps one hand on the stone wall. If it was a door, maybe it could be his escape. "Who are you? What's going on?"