la serpiente asesina negra (The Black Killer Snake

la serpiente asesina negra. A rampaging monster of sorts that travels in a slippery snake-like manner along the ground or really any surface. This slither is accompanied by constant soft jabs at the floor, which are done so by its legs, leaving it moving in an unnatural manner. A strange characteristic is that mist exudes from its body, but this mist has supernatural properties, as it is actually a disguise for a portal that leads to another realm, which from a person's perspective is seen as a never-ending grassland. Across the dirt is an unimaginable amount of treasure scattered everywhere. This treasure is merely a mirage, as once you attempt to take it, you will be placed into a trance where you will immediately eliminate yourself, commonly through strangulation.

In terms of a description the demon has dozens of large metallic thorns protruding down its body which bends in several unusual ways in addition the creature is long with a length of 300 feet ,tall with a height of 150 feet, far faster than its size would suggest and incredibly capable of destruction as its legs are essentially giant knives which are black in colour and seem to be constructed of a metallic material so it's plenty deadly in addition the mist has another strange trait which  allows the creature to breathe without the need of oxygen so travelling through the depths of the ocean or somehow getting into space and travelling the  cosmos is not impossible meaning it's both mobile and dangerous.