Colossal Ruin, Alice Wiki

The Colossal Ruin is a Ruin subspecies and the largest Ruin enemy with strong defenses and lethal attacks. It primarily attacks with fiery projectiles and attempts to grab Alice Liddell 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 Colossal Ruin is encountered near the end of the Deluded Depths

Beat the Colossal Ruin - Alice: Madness Returns

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Chapter 2 Enemies - Alice: Madness Returns Guide - IGN

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