Terrifying Howl - (Rage Power)

The barbarian unleashes a terrifying howl as a standard action. All shaken enemies within 30 feet
must make a Will save (DC equal to 10 + 1/2 the barbarian’s level + the barbarian’s Strength modifier) or be panicked for 1d4+1 rounds.
Once an enemy has made a save versus terrifying
howl (successful or not), it is immune to this
power for 24 hours. A barbarian must have the intimidating glare rage power to select this rage
power. A barbarian must be at least 8th level
before selecting this power