Before revision: Since objects can be seen by light from a source reflecting off their surfaces and hitting the viewer's eyes, the most natural form of invisibility (whether real or fictional) is an object that neither reflects nor absorbs light (that is, it allows light to pass through it).
After revision: Since objects can be seen by light from a source reflecting off their surfaces and hitting the viewer's eyes, the most natural superpowers of invisibility (whether real or fictional) is an object that neither reflects nor absorbs light (that is, it allows light to pass through it).