[@Enki]

[i]The monster appeared to understand what Nergal had said. It seemed to smile or leer back at him, sopping muzzle crinkled back into a strange, dog-like grin. The horrible creature had lips, and what lay behind them it didn't reveal. Its sightless eyes had taken on the aspect of a cruel child that was about to enjoy pulling the wings from a fly. It looked stupid-smart.

As the tetrahedron's trap snapped shut, it would have no captive within. The monster was a thing that defied sane description, but at the core and disregarding the ways its terrible form defied reason, it most resembled a cross between a serpent and a bat. Certainly it moved just as quickly as either of the two. It had used its gangly arms and powerful tail to propel itself to the side, contracting its tail after it. Its heat pits could detect light, hence its awareness of the glow. Now on Nergal's right, it would begin trying to slowly circle around him. It would continue hauling its body to its left, leaving a snail trail of slime wherever it slid. Its tail coiled and uncoiled in the air above its back, like a writhing vertical python. It was waiting for Nergal to make the first move. [/i]