Corecreature

Corecreatures are vicious, pie-eating monsters that originate from deep within the earth's mantle--hence the name corecreature. They have the appearance of an oblate spheroid with legs and a mouth. These creatures were not known to exist until 2011, when they rose up from The Hole and attacked Antarctica to fulfill their insatiable appetite for pie.

Description
Corecreatures existed for millions of years safely hidden underneath the earth's surface. They are intelligent creatures and have built up their own society of corecreatures. Since there is no real open space underground, they have made use of natural volcanic chambers and tunnels more near the crust. A corecreature is composed of a strange form of igneous rock and have movable humanoid-like joints and legs. They do not have any known biological relations with surface-world lifeforms. In fact, it is not even known if they have DNA or not. Corecreatures are not divided into male and female genders. They don't rely on food to survive, but food is rather a pastime--they only eat food for taste.

Society
A typical corecreature would live in individual dwellings that are made out of intrusive igneous rock (granite, for example). These dwellings are bunched together (like rowhouses) and are facing a roadway that provides a means of transportation. Technology of corecreatures are crude in comparison to advanced Antarctic technology. Transportation is done by simple walking. Corecreatures don't possess advanced technology such as electricity or gunpowder. Weapons of the corecreatures are maces, clubs, arrows, spears, and swords.

Pie Uprising of 2011
Corecreature cuisine was nowhere similar to Antarctic food. However in 2011, Kwikcakes fell down The Hole, which leads to a major corecreature settlement. He was carrying a blueberry pie at the time, which fell out of his grasp during the fall and landed on the head of one corecreature, who subsequently consumed it. Kwikcakes grew mad. He used his explosive farting power to maim all the corecreatures by nearly collapsing the cavern in which they lived in. Kwikcakes, being very stupid, failed to realize all he did was just make the corecreatures angry and he farted again to rocket himself out of The Hole. People previously thought The Hole was simply some form of volcanic cavern, but when the Kwikcakes emerged from the Hole, it was revealed The Hole was connected to another land. That corecreature thought the pie was delicious, and all the other corecreatures felt to need to seek revenge. All the corecreatures subsequently climbed up The Hole and waged an invasion of Antarctica to gather as much Pie they could get and to avenge their kind by trying to destroy Kwikcakes. And thus, the Pie Uprising of 2011 took place.