Malus is a large, tall, immobile, sorcerer/fortress like colossi found at Cataclysm Circle. He is the sixteenth colossi encountered and will blast the player with spheres of energy. He has fur only on his upper body and an injury on his back and left arm. Bands of orange light around his arms act like a bug zapper and prevent the player from passing them. Malus and his location have a strong sense of loss, despair, and hopelessness. They signify the end of Wander’s trials.
Due to Wander's exhaustion from previous battles, the loss of his companion horse Agro, and the somber timbres of Malus's battle music it is considered the most emotionally impacting of the colossi battles.