An aranea is an intelligent, shapechanging spider with sorcerous powers. In its natural form, an aranea resembles a humpbacked spider a little bigger than a human, and weighs about 150 pounds. The hump on its back houses the aranea's brain. All araneas have a single alternate form as well-this alternate form is that of a Small or Medium humanoid. Although an aranea can assume a spider-hybrid variant of this form, it cannot use its change shape ability to assume multiple humanoid forms-this additional shape is locked into one unique appearance. Araneas typically gather in small colonies of two to six individuals, making webbed nests high in trees.