Barbarian (Unchained) › Rage Powers

Unexpected Strike (Ex)

The barbarian can make an attack of opportunity against a foe that moves into any square threatened by the barbarian, regardless of whether that movement would normally provoke an attack of opportunity. The barbarian can use this ability only when there are no other foes in a square threatened by the barbarian. A barbarian must be at least 8th level to select this rage power.