Mi-Go
Background
The Mi-Go are otherworldly beings. They are as numerous as the stars and use portals to transfer to other planets. The Mi-Go can use a form of telepathy to try and persuade other creatures to do their bidding.
During the events of The Whisperer in Darkness (2011)
P.F. Noyes leads a ritual attended by Mi-Go and cultists including Walter Brown. As Noyes is about to jump into the portal, Albert Wilmarth throws Henry Akeley's head cylinder in the portal, causing the ritual to fail. The Mi-Go attack and kill Noyes and the cultists. Albert runs back through the cave and down the mountain and back to the barn. The Mi-Go circle the barn, but Albert and Hannah Masterson are able to get Will Masterson's crop dusting plane started and they fly it out of the barn as the Mi-Go use their mind powers to try and stop them. The Mi-Go attack them and start to destroy the plane. Hannah throws a canister at one of the Mi-Gos, injuring it, but another one grabs Hannah and then drops her to her death. Albert then decides to fly the plane into the portal.