From the Evolutions section of Excavator Monthly Compendium, page 161. These brutes are grizzly sized mutants and straight from a mad man’s dream. About a quarter of these monsters are also extra mutated and can appear on the scene with bone spikes, throwing quills, poison blood, acid spitting ability, and bladed limbs or worse. Learn more about this 260 page source book here: https://www.outlandarts.com/TME-excavator-monthly-compendium.htm