X-Factor #24

In "Masks," X-Factor faces their most terrifying trial yet when they confront Apocalypse aboard his ship—only to discover Warren has been transformed into the Archangel of Death. Captured and helpless, the team watches as the Horsemen unleash chaos across New York, while Caliban, tempted by promises of true power, aligns himself with Apocalypse. Written by Louise Simonson and brought to life with bold, dynamic art by Walter Simonson—both on interior and cover—this pivotal 1988 issue marks a turning point in the series, with the stakes higher than ever.