The Colossal Ruin is a Ruin subspecies that is first met in chapter 2. It is the largest Ruin enemy in the game, with strong defenses and lethal attacks. It primarily attacks with fiery projectiles and attempts to grab Alice with its doll-arm mandibles. Upon taking significant damage, it reveals nozzles in its "mouth" and breathes massive gouts of fire. It has multiple doll heads throughout its body, and will die when all of the doll heads have been destroyed.The first encounter with the Colossal Ruin only requires you to do significant damage to its body heads, not actually defeat it. See: Alice: Madness Returns