Complex sentence: Notable additions to the X-Men have been Emma Frost, Husk, Northstar, Armor, Pixie and Warpath, while former villains such as Juggernaut, Lady Mastermind, Mystique, and Sabretooth became members of the X-Men.
Split into simpler sentences: Notable additions to the X-Men have been Emma Frost, Husk, Northstar, Armor, Pixie and Warpath. While former villains such as Juggernaut, Lady Mastermind, Mystique, and Sabretooth became members of the X-Men.