Intangibility is the state of not being a tangible thing that cannot be interacted with. It is mainly seen in two states throughout fiction: True Intangibility, where everything goes through the user (although interaction with the floor and light appear to never really be avoided), and Selective Intangibility, where the user can ignore certain things, yet interact with others. An example of the latter would be that they may attack their opponent yet shift through walls. It is particularly useful, as it allows the user to have attacks simply go through them, rather than damage them.