Marvel: Matter Alteration

Nathan Summers (Cable)
He has the ability to alter molecular and atomic structures, in his own techno-organic components (though this may be a function of telekinesis, as opposed to a discrete superhuman power), and the ability to alter molecular valences.

Rachel Summers
As the Phoenix, she has shown the ability to alter molecular and atomic structures and the ability to alter molecular valences or even rewrite her own genome. Rachel has alos been able to create a micro black hole.