Human: Generate for a spooky scene inside a cave with a portal. Assistant: 
Dominating a circular expanse of raised stone surrounded by a small plaza, a sculpted slick stone portal worked into the shape of twining bodies casts sickening radiance upon the surroundings. The portal occupies the tallest plateau in a vast underground chasm. Warm, moist air blankets the area heavily, stinking oppressively of mildew and old rot.