4. Destiny
Born to a well-heeled Austrian family, Irene Adlers mutant ability developed in the form of searing visions which she described in a series of diaries, her precognitive notions both proving accurate and leaving her physically blind. Destiny employed Mystique to help her understand her visions, whilst in turn Destiny helped Mystique to form the X-Mens arch nemeses, The Brotherhood of Evil Mutants, as a way of enabling the social engineering necessary to prevent the worst of them from coming true. A crack shot with a crossbow (given that she can predict where her bolts will land), Destiny is nonetheless one of the least physically powerful mutants. That said, she offers all manner of interesting narrative possibilities given that the vast uncertainty of the X-Men universe makes her precognitive ability potentially more powerful than any weapon. In addition, she offers the capacity to switch up the comic book convention of having powerful men dictate the action, not only providing a cerebral counterpoint to Professor Xavier, but on the basis of her intriguing sexuality as the sometime lover of Mystique, who, while perhaps fundamentally female, can, of course, assume any human form.