Excalibur (2019) #25

THE ONE TRUE KING RETURNS! And he's here to exterminate the witchbreed! King Arthur and his army turn Otherworld into a battlefield-again. Backed into a corner, Betsy Braddock makes a desperate choice that will reshape the realm-and mutantkind-forever. The fate of the Starlight Citadel is at stake, and if the Citadel falls…so falls all reality.