X-Men: Die by the Sword

A five-part miniseries from 2008, X-Men: Die by the Sword brings together Marvel's Excalibur and the reality-hopping Captain Britain Corps for a high-stakes clash against the mad cosmic entity known as the Fury. Written by Chris Claremont, the story serves as a direct sequel to both X-Men: The End and New Excalibur, weaving together threads of alternate realities and family legacy. Though a single issue, it matters as a Claremont-era capstone that explores the fate of the Captain Britain mythos and the X-Men's multiversal responsibilities.