Nyarlathotep

Nyarlathotep, known to many by his epithet "The Crawling Chaos", is an Outer God in the Cthulhu Mythos. He is the soul of the otherwise nearly-mindless Outer Gods. He knows their desires, and when they stir, disquieted, it is he who takes action. Cults and individuals alike seek to appease him because his goals are at least comprehensible to mortals. Technically, those who “worship” Nyarlathotep actually worship the Outer Gods he serves, but he directs and focuses their efforts in what is, to him, the proper direction.
Most of the Outer Gods have their own cults serving them; Nyarlathotep seems to serve as He serves several cults and takes care of their affairs in the other Outer Gods' absence. Most Outer Gods use strange alien languages, while Nyarlathotep uses human languages and can easily pass for a human being if he chooses to do so. Finally, most of them are all-powerful yet evidently without clear purpose or agenda, yet Nyarlathotep seems to be deliberately deceptive and manipulative, and even uses propaganda to achieve his goals. In this regard, he is probably the most human-like among the Outer Gods.
Nyarlathotep’s influence has no true effects on its own aside from its Unnamable Doom, and primarily serves to intensify those of other elder beings. Unlike many of the Great Old Ones or Outer Gods, Nyarlathotep enjoys direct interaction with humanity and uses one of his thousand forms as an avatar when he is called upon.