Your ability to manifest an astral construct is more fearsome than most.
Prerequisite: Ability to manifest astral construct
Benefit: Any astral construct (or astral juggernaut) that you create can leave an opponent shaken once it successfully hits with its slam attack. Only the first successful slam attack after the astral constructed is created gains the benefit of this feat. Once the astral construct successfully hits with its first slam attack, the recipient of the attack must make a Will save or be shaken for 1 round. The DC of this Will save is equal to 10 + ½ Astral Construct’s HD + Astral Construct’s Charisma modifier.