This creature appears to be a mix of giant centipede and slate-gray iguana.

Cavern crawlers are subterranean creatures that make their lairs in narrow pits and shafts, feeding on cave rats, monstrous centipedes and spiders, and other such underground denizens. They are feared by subterranean dwellers for their toxic bite which causes its victims to become delusional or lost in deep dark cavern recesses. A cavern crawler attacks from ambush, clinging to stalactites or overhangs and dropping on its unsuspecting prey. The target is subjected to repeated bites and dragged to a safe place before being devoured by the cavern crawler. Instinct: Bite repeatedly

• Sicken and confuse with a bite
• Prowl through the stalactites.