The Undead Unluck: Winter-hen story continues with Billy learning that the artifacts, including Unluck, are evolving as UMA Winter intensifies. He discovers their original purpose is to defeat God, but when confronted by Juiz, he refuses to work together towards that goal. Instead, Billy seems determined to acquire the Ark and Apocalypse, prompting a brutal clash between Winter-hen's forces and those of UMAs Autumn and Summer, with Andy and Fuko caught in the middle.