Detect Hostile Intent

For the duration of this spell, you become aware of the presence of any creatures with hostile intent within 30 feet of you, and their direction from you (but not their specific location).

The spell detects active aggression, as opposed to vigilance. In addition, while this power is active you cannot be surprised by creatures that are susceptible to mind-affecting powers.

While under the effect of this spell, you can make Wisdom (Insight) checks as a free action on your turn against anyone within 30 feet of you.

The power can penetrate barriers, but 3 feet of stone, 3 inches of common metal, 1 inch of lead, or 6 feet of wood or dirt blocks it.