Spectres, wraiths, and a few other creatures lack physical bodies. Such creatures are insubstantial and can’t be touched by nonmagical matter or energy. Likewise, they cannot manipulate objects or exert physical force on objects. However, incorporeal beings have a tangible presence that sometimes seems like a physical attack against a corporeal creature. Incorporeal creatures are present on the same plane as the characters, and characters have some chance to affect them. Incorporeal creatures are inaudible unless they decide to make noise.