The hero can render his body intangible to normal matter. This enables him to pass harmlessly through any object. The hero's power rank must exceed the barrier's material strength in order for Phasing to occur. The hero can Phase through Force Fields, Body Armors, Resistances, and Invulnerabilities of lower ranks by making a green FEAT. Because the hero is out of phase with normal matter, he cannot breathe. Thus, the practical duration limit on this power is the length of time the hero can hold his breath. If the hero has some way around this problem, the duration is unlimited.
Note: if the power is somehow "turned on" permanently, as happened to Kitty Pryde, the power gains the ability to transform air into phased particles that the hero can breathe.
In the Marvel Universe, Phasing has a damaging effect on delicate electronic devices. By Phasing through such devices, the hero can disrupt normal activity and scramble any on-line programming. If, during the character creation process, the player decides to forego this side effect, he can raise his hero's power rank +1CS. For modesty’s sake, it is assumed that the power also transforms the hero's clothing and carried possessions into phased matter. The power’s side effect automatically scrambles any electronics the hero is carrying (Kitty Pryde wears a wind-up watch, never a digital one). If the player wants to risk his hero's modesty for the sake of a more realistic game, the player can assume either that the power only transforms whatever the hero was wearing when he first got this power (severely limiting the hero's wardrobe) or that there is a base 70% chance that the power automatically transforms whatever the hero is wearing at the time. In either case, this must be determined when the hero is first created.