Intangibility (self) – The ability to turn into a phantom.
In Batman V1 #110, Batman escapes from a cell as a phantom.
Kitty Pryde (Marvel) uses quantum phasing to become intangible.
The Phantom Girl becomes a totally immaterial phantom to move through objects (DC Who’s Who V1 #18).
A prisoner becomes a phantom and escapes from jail in Strange Adventures V1 #48.
The Vision (Marvel) uses density control to pass through objects but does not become truly immaterial.
Kage has created a martial art that uses her intangibility in George Perez’s Sirens #2 (Boom).
Fade and Flux are two characters that can turn intangible in the Savage Dragon universe.
The Space Ranger (DC) must face the Ghost Creatures of Phobos can turn intangible in Tales of the Unexpected V1 #55.
The Shi’ar Imperial Guard includes Astra (Marvel) in Mighty Thor #446 and Plutonia that can turn intangible.
Soljer stabs Phantom Girl (DC) with a phantom bayonet in Superboy starring the Legion of Super-Heroes #2.
The idea that phantom objects can interact with each other is repeated in The Spectre V1 #7.