Demon Wind 2: The Serpent’s Coil (1970)

A team of occult researchers ventures to a rural area, where a suspected satanic murder took place at an old farmhouse, to uncover the secrets of the cult responsible. The team soon discovers that the murders are part of a much larger and more sinister force than they could have ever imagined. When a demonic artifact is found and accidentally activated, the team is plunged into a hellish, demon-infested world, where they must fight to survive or face a gruesome fate as part of the demonic legion themselves.