What are they?

Jaden blinked open his eyes slowly. He was sure his eyes were open, but he could see nothing. It was very dark. He sat upright, and he could feel his head aching badly, and the stinging pain on his neck didn’t feel any better. It was then the memories of earlier came flashing back.

“That weird creature, Archer bit his neck. Were they serpents? Cos they definitely looked the part. But how could they be serpents?” he thought.

He tried getting up on his feet, but his legs gave away, and he fell back on his butt.

“I need to get out of this place, whatever it is” he thought again, forcing his way up. He aided his walking by placing his hand on the wall. He kept walking around, resting his back on the wall, searching for a door, until his hand touched wood. He knocked slightly on it to confirm. It was wood!