In one uncanny issue, the X-Men meet two of the most important mutants they will ever know! One will become one of the greatest X-Men of all - and the other will spend years as a bitter enemy before proving herself a hero. They're Kitty Pryde and Emma Frost, and their destinies are intertwined! In their first appearance, Frost - White Queen of the insidious Hellfire Club - seeks to persuade Pryde to join her Massachusetts Academy rather than Xavier's School. She's one headmistress who's strict about getting her own way - and the X-Men will soon learn just how strict! Meanwhile, the Hellfire Club's Jason Wyngarde exerts his influence over Jean Grey in the first chapter of the Dark Phoenix Saga! It's one of the all-time great Marvel comic books, boldly re-presented in its original form, ads and all! Reprinting X-MEN (1963) #129.