These man-sized, stubby-headed, six-legged lizards may be found in one of two states: lazily basking, or in a cannibalistic frenzy. For much of the time, they eat and drink very little, and may be confused for strange rocks. The antenna ridges on their backs collect energy from their surroundings to feed their growing brains. But when they reach a plateau of mental maturity, they must feast on brains to continue to develop. Commonly, this is done via cannibalism. It takes a lot of work for them to crack open the protective casing surrounding the brains ensconced in each other's backs. Luckily, they are able to wield rocks in their forelimbs. It is said that ancient brainy lizards may outstrip human beings in intelligence if they are not first devoured by pteranodon. And rumors exist of lizards with strange powers, perhaps gained by devouring the brains of sorcerers! Instinct: to consume brains

• Cannibalize its fellows to evolve its intellect
• Understand and thwart enemy tactics
• Wield a discarded weapon