Quote Originally Posted by Johel View Post
What if it's the illusion of a ghost ? It can't be touch as it's etheral and even common folks know stories of ghosts getting through walls so... You might get that flanking bonus with this.
It still doesn't provide flanking, the same as it can't attack. However, touching it would only be interacting, not auto-disbelieve, as your hand going through it is consistent with how a real ghost would behave (that's why I love illusions of incorporeal creatures, especially immediately preceding attack by actual incorporeal creatures).