Magneto and the Sentinels may be the X-Men's deadliest enemies, but there were plenty more in the mutant team's earliest adventures! Lucifer! The Maggia! The unstoppable Juggernaut! Plus: See the first appearances of Ka-Zar and the Banshee! The tempestuous X-Men tenure of the Mimic! Quicksilver and the Scarlet Witch's journey from evil to good... and vice versa? Guest-starring Namor the Sub-Mariner, the Human Torch and the Avengers! Collects X-Men #1-31.