New Arcs Begin Across Exit City, Revolution 9, & Hour of the Wolf as Mark London’s World Continues to Expand Mark London’s Underworld was first announced in 2024 as part of Mad Cave Studios ’ 10th Anniversary celebration, launching an interconnected line of titles that included Revolution 9, Hour of the Wolf, Exit City, and the epic crossover Endless Night. Nearly two years later, this fan-favorite corner of the Mad Cave universe expands in a bold new direction as second

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"The world of Wolvenheart is dense, fascinating, and beautiful in its own dark, gothic way."