Brain cloud

Brain clouds are demigod-level Deities. An ancient lovecraftian monster, they are the only known demigod originating from Earth.

Physiology
Brain clouds are very large, pink, amalgamous herds of flying brain matter. Besides The Alphabet Bird they are one of the most intelligent beings in the universe they reside in.

Brain clouds can summon a seemingly infinite amount of brain-tentacles. They also have immense psychic powers, to the point of being able to control matter.

Behaviour
Brain clouds feed on brain matter and pure sugar. By feeding on brain matter they grow both in size and brain power, but also energy consumption. Many brain clouds have been observed to enslave entire ancient cultures to fuel their need of sugar.

On rare occasions, brain clouds have been observed to grow to the size of actual clouds by turning an entire planet into a massive facility to farm brain matter and sugar. These kinds of planets are incredibly unsafe for anything other than immortal beings, gods and other, more powerful demigods.

If low on sugar, a brain cloud will resort to sleeping for millenias on end. This conserves energy to only a small precentage of active usage. However, should no sugar be found even after several millenia, a brain cloud may become agitated and start looking for sugar on its own. If no sugar is found, it will attempt to leave the planet.

There exist some cases of benevolent brain clouds. Certain immortal beings, most notably Indiana Stark, have managed to befriend a brain cloud.

Trivia

 * A brain cloud was used as an opponent in the finals of the 532nd annual World's Toughest Stick-man competition held in 32011. One finalist forfitted after nearly dying to it.
 * In a few incarnations, Piggy has met a dormant brain cloud in the year 10000. In all of these scenarios, Piggy dies, but not always directly from the brain cloud.