The X Species (2017) online

Deep in the woods, an archaeological expedition is on the verge of a historic discovery, when they find themselves with no defense against an unrelenting predator. Taking refuge in the catacombs of a cave hidden in the hills, tensions escalate as the team begins a descent into insanity navigating their way through winding and endless caverns. As fight to survive turns to fear, the real terror begins in ancient grounds, where humans have always been prey..