The Midnight Basement Swimmer is an horrendous creature created by the famous artist, Trevor Henderson. The creature is a floating mass of tangled bones and flesh. It possesses a single limb, which is often visible, as it is nearly always seen above the surface of the water in the basement the creature dwells in. The limb is sticking out of a mass of flesh, which is brown-reddish in color. The arm itself seems to contain no flesh at all, as the skeletal structure of the arm is visible and a tight mass of skin is wrapped tightly around it. The arm's skeletal structure is exactly the same to a regular human's arm. The mass of flesh it is attached to also seems to be the creature's body. It contains bony structures embedded into the flesh, almost like human vertebrae, or the dinosaur species magniventris Brown (Ankylosaurus). The Midnight Swimmer's body is huge, as most of its mass is concealed below the water. The head and neck, however, are the strangest attributes to this creature. A single, stretchy, malleable fleshy neck sticks out of the body, like a giraffe. At the end, a disturbingly surreal human skull is attached. The skull possesses wide, human eyes, which are popping out of the creature's eye sockets. The creature has two slits in the middle of its face, which serve for nostrils and the mouth is stretched into a wide, toothy grin.
The Midnight Basement Swimmer, as its name suggests, is currently located in an abandoned dwelling, where it resides in the flooded basement. The area was flooded long ago, but when the waters resided the basement stayed flooded due to the sealed environment and the build up of moss, lichen and moist air. The creature rarely ever pops its entire body below the water surface, and it is unknown where the creature came from, what it does in its spare time or if it ever reproduces. The Basement Swimmer came to the basement by unknown means. It is extremely hostile and will track and attack any creature in its watery lair. When a prey item is spotted, the Swimmer will release a shrill, ear piercing shriek and attempt to swim to the location. The creature is an very agile and fast swimmer, but on land it is slow and resorts dragging itself. When the victim is caught, the Midnight Basement Swimmer will retreat to unknown parts of the basement, presumably to drown and feed on its victim.