#stcreatures

A fearsome sentient creature aligned with the Upside Down, Vecna had humble origins as the human Henry Creel. After moving to a new home in Hawkins in March 1959, the young Henry discovered he had remarkable psychokinetic abilities and could manipulate the perceptions of others. Motivated by a misanthropic and nihilistic philosophy, Henry used his powers to psychologically torture his family, eventually killing his mother and sister. After Henry’s father, Victor, was falsely presumed to be the killer, Victor was imprisoned and driven further into madness. These events would draw the interest of Dr. Martin Brenner, who took Henry to Hawkins National Laboratory to be studied; he was designated 001, becoming the laboratory's first child test subject. 

A mysterious entity, made up entirely of silver-black particles, lived within the alternate dimension known as "the Upside Down". The entity was gigantic, looming at least fifty stories tall and sported a distinctive spider-like appearance. The Mind Flayer exercised supreme control of the Upside Down via a psychic link, with Demogorgons, vines, and Demobats forming a shared hive mind; for a period in 1985, possessed humans known as "the Flayed" also comprised part of the hive mind. In a sense, the entirety of the Upside Down was like one gigantic organism, with all its contents and agents mentally connected via the Mind Flayer.The entity was discovered by Henry Creel between 1979 and 1983, following Henry's banishment to the Upside Down. 

The Demogorgon is a tall and thin humanoid creature with elongated limbs. It has no facial features until it unfurled the flesh like a flower to reveal "petals" lined with many sharp teeth, and a large open mouth. The Demogorgon's arms and digitigrade legs end in claws; its skin is slimy. It is also is able to move between dimensions, has outstanding physical strength and appeared to have had some form of telekinetic power.