Phasing

Sometimes confused with "Intangibility", Phasing is a term used to describe the ability of some characters to move through solid objects. It differs from intangibility by it's fundamental process; characters who phase move through physical objects whereas characters that are intangible cannot be touched.
Other uses of Phasing include passing their atoms through other atoms while moving, temporarily merging with objects, as well as time phasing. Certain limitations like other 'phasers' or energy might stop the action or ability from occurring.