Line of Perception

Powers with the Perceptive keyword require Line of Perception, indicating that your perception of the target must be mostly unobstructed in order to utilize the ability (i.e. you cannot target creatures with Superior Concealment, even if you know their location). Perceptive powers that target an Area require Line of Perception to the origin of the area, but do not require Line of Perception to each individual target (as everything in the area is automatically targeted). Powers with the Perceptive keywords do not require Line of Effect.