Attacnids are ferocious, eight-limbed predators found in a variety of dry environs: savannahs, deserts, badlands, hills, mountains, and Ancient ruins. They have rounded bodies 6' in diameter, with hard, spiky carapaces and powerful mandibles, and two of their limbs end in piercing hooks. Attacnids skitter and bounce across the ground with almost unearthly speed.
The creatures have insatiable appetites, and are active hunters. Their bite injects a Class 4 poison. Anyone successfully striking an attacnid bare-handed suffers 1d4 damage from their spines.
Attacnids are terrified of birds, and panic when encountering avian-based Mutant Animals and/or those with the Complete Wing Development mutation.