Tempus Insight

The Barbarian has a thought per day, a brilliant insight - granted by Tempus, the god of war. Either the DM indicates the Player had an accurate insight, or the player can request one - an auto-crit Insight Check.

The Tempus Insight is delivered via a burst of psychic energy.

The character takes psychic damage (1d4 + fixed values at some higher levels). 

Strength save - on a successful save the Barbarian takes half damage.